Ch3ch2cl Intermolecular Forces

Is used to explain the fact that the carbon-to-carbon bonds in benzene, C 6 H 6, are identical. When CH3CH2CH2OH is dissolved in water, it forms hydrogen bonds with water molecules. , Thiol = R-SH. An intermolecular force is an attractive force that arises between the positive components (or protons) of one molecule and the negative components (or electrons) of another molecule. 00794*2 + 15. Alkenes are too valuable to waste in this way. 5 - Which of the following has a definite volume but Ch. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. So, $\mathrm{NCl}_{3}$ contains dispersion and dipole-dipole forces. CH3Br or CH3Cl I chose: CH3Cl 2. 2 Names and Identifiers. What is the intermolecular force present in br2? Ion−Ion forces are much stronger than any intermolecular forces. com - id: 5650bd-YzFkZ. C) ion-dipole force: 11) Choose the molecule or compound that exhibits dispersion forces as its strongest intermolecular force. The stronger the. Water and ethyl alcohol will both have dipole-dipole interactions. Explain your reasoning for ordering them. CH3OCH3 has the lowest boiling point because the intermolecular forces are primarily due to weak van der Waals bonds with no hydrogen bonding component as in the other molecules. Please explain and find out. Arrange these compounds in order of increasing boiling point: ch4, ch3ch3, ch3ch2cl, ch3ch2oh. USE: Ethyl bromide is used to make other chemicals and as a solvent. Strengths of intermolecular forces. attractive forces that must be overcome are hydrogen bonding and dispersion forces. Butane can interact with water by neither means. However, acetone forms hydrogen bonds to water much more effectively than chloroethane does, resulting in greater solubility of acetone in water. The name "Ion dipole forces" describes what they are, which simply speaking, are the result of the Coulombic electrostatic interactions between an ion and the charged ends of a dipole. A colourless gas at room temperature and pressure (boiling point 12℃), it is used as a mild topical anaesthetic to numb the skin prior to ear piercing, skin biopsies, etc. Intermolecular forces exist between dipoles (like hydrogen bonds), between dipoles and induced dipoles (like Ar and HCl) and between induced dipoles. dispersion IV. The main intermolecular interaction in hydrocarbons is van der Waals forces: the attraction of the electrons of one molecule for the nuclei of another molecule. In this video Paul Andersen explains the importance of intermolecular forces in chemistry. Intermolecular forces act between molecules. AP Chemistry Practice Test: Chs. E) There is no general rule to predict covalency in bonds. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Intermolecular forces are forces that act between distinct molecules. Ethanol, a lighter molecule, has a normal boiling point of 78 ""^@C, because here the dipole-dipole interaction is hydrogen-bonding, one of the most potent of all the intermolecular forces. Forces and Liquid Structure Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding) *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids) Molecular Shape and Structure. So the actual trend here is H2S. Crystalline Solids Atoms and molecules are composed in 3D. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. An important type of dipole-dipole forces are hydrogen bonds. strongest possible intermolecular force (IMF). It consists of sulfhydryl group, i. intermolecular forces are forces that act between stable molecules or between functional groups of macromolecules. CH3CH2OH - will have the highest boiling point because of the presence of an O-H bond. Intermolecular forces are mainly three types: Dipole-dipole interaction; Hydrogen bond; London dispersion force. As you learned in school, these coulombic forces (as they are often called) cause opposite charges to attract and like charges to repel. I2 is a nonpolar molecular substance; only weak dispersion forces are possible. Students will use the Intermolecuar Forces Investigation handout to guide them trhough the process. A colourless gas at room temperature and pressure (boiling point 12℃), it is used as a mild topical anaesthetic to numb the skin prior to ear piercing, skin biopsies, etc. Intermolecular Forces - Hydrogen Bonding, Dipole-Dipole, Ion-Dipole, London Dispersion Interactions - Duration: 45:36. Asked in Science. None of these 11. free from the influences of intermolecular forces from other substances nearby). When given a linear molecule I determined its overall structure to be polar. You may use an HB pencil for any diagrams or graphs. On a phase … O2 and CH2Cl2 e. CH3CH2OH or CH3CH2Br I chose:CH3CH2OH 2. has stronger / more (VdW) intermolecular forces. Intermolecular Forces. Revision Functional Groups and Organic Chemistry IB Chemistry - Revision What is the name of the functional group in the following? O CH3 O – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. Recentdevelopmentsin microwavespectroscopyandthe related theory2'-10 have providedpowerfulnewtools for the studyof this phenomenon. forces than CH 3OH, so it has the highest boiling point. cyclohexylbutyl ether b. 5 points 47. Absolute alcohol: Absolute alcohol is 100% ethanol prepared from rectified spirit 95. how can i determine from A, B & C which is the highest of those three. The longer chain has more electrons (more bonds) and so it possesses the stronger dispersion forces. Arrange the compounds in order of increasing boiling point. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. H-bonding tends to be the strongest force, if present. com - id: 436a4b-OGNmZ. Academic year. • Alkanes have covalent bonds within molecules and intermolecular van der waals forces • A branched chain alkane has a lower Mt than straight chain isomer as branched chain alkanes can’t pack as closely together and have smaller molecular surface areas so van der waals forces are reduced. The Paperback of the Molecular Modelling and Bonding by E A Moore at Barnes & Noble. (b) Both chloroethane and acetone are polar. CH2CH3 + HCI. CH3CH2CH2CH2CH2CH3 II. KCN is a ionic compound and provides cyanide ions in solution. An important type of dipole-dipole forces are hydrogen bonds. We don't have the exact solution yet. The smallest (CH4) likely has the weakest intermolecular forces. CH3CH2Cl CH3CH2OH www. The answer is the same, but more general. Since these intermolecular forces are weak, the molecules are readily separated. an increase in the intermolecular forces in the liquid 3. dipole-dipole II. CH3CH2C1 7. so, all these molecules have the same size and weight so thats ruled out. The enthalpy of vaporization of CO2(l) is 9. Hydrogen Bromide is made from KBr and 50% concentrated H2SO4 ** Phosphorus(III) Iodide is produced by reacting red phosphorus and Iodine. CH3CH2OH + HBr –> CH3CH2Br + H2O. Water and ethyl alcohol will both have dipole-dipole interactions. 9994 Phosphorus. Johannes D van der Waals, Dutch, was the first to postulate intermolecular forces in developing a theory to account for properties of real gases. 811 Aluminum 13 12. Topic: Intermolecular forces Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D This alkane is predicted to have the highest melting point of those shown: A) CH3CH2CH2CH3 B) C) CH3CH2CH2CH2CH3 D) E) Ans: E. arrange the following in order of increasing boiling point: CH4 CH3CH2CH3- CH3CH2CH2Cl- CH3CH2CH2OH- i have found the boiling points for these but for some reason its not working out , can anyone help? please, only helpful answers. 76) Which intermolecular force is primarily responsible for the interactions among alkane molecules? Answer: Van der Waal's or London forces Section: 3-9. Phillis Chang. First, it is an ion or charged molecule that interacts exclusively through neutral polar dipoles (Fig. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. H2O is an example of a linear molecule from the lab that demonstrates what I have described in question number one. intermolecular forces Rank the following substance from highest melting point to lowest melting point. The bonds in the water molecule themselves are covalent bonds. !Point to and identify the type of intermolecular force present in each. CH3CH2CH2CH2CH2CH3 II. • Melting points of the hydrogen halides increase in the order HCl < HBr < HF < HI. Section: 2. List the following molecules in order of increasing boiling point: Br2, F2, I2, Cl2, Answer. A dipole-dipole is an intermolecular force that occurs between two polar molecules. Chloroethane is the simplest and least toxic member of the class of chloroethanes, that is ethane in which a single hydrogen is substituted by a chlorine. Whether two atoms can form a covalent bond. Intermolecular forces originate from their interactions between charges, partial charges, and temporary charges on molecules. Ethane (CH3CH3) has a melting point of -183 Cand a boiling point of -89 C. A CH3CH2Cl, B (CH3)2CHC1, D CH2Br It has been estimated that for every atom of chlorine generated from a fluorohalogenoalkane 33. Note: If you aren't sure about Van der Waals forces, then you should follow this link before you go on. You will find the way geometric isomerism affects melting and boiling points explained towards the bottom of the page you get to by. ion-dipole III. More information on molar mass and molecular weight. !Point to and identify the type of intermolecular force present in each. INSTANT DOWNLOAD Organic Chemistry 8th Edition by Bruice – Test Bank Sample Questions Organic Chemistry, 8e (Bruice) Chapter 3 An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure 1) Which of the following is a tertiary amine?. In descending order of strength, they include hydrogen bonding, dipole-dipole interactions, and van der Waals forces. Propane + Br2 Propane + Br2. forces also include dipole forces. A colourless gas at room temperature and pressure (boiling point 12℃), it is used as a mild topical anaesthetic to numb the skin prior to ear piercing, skin biopsies, etc. As the number of atoms composing the molecules in this homologous series increases, so does the extent of intermolecular attraction via dispersion forces and, consequently, the energy required to overcome these forces and vaporize the liquids. Which substance has the highest boiling point?. 2 (ii) H2SO4/H+/acidified and Cr2O72-/(potassium/sodium) dichromate; Accept suitable oxidizing agents (e. Recentdevelopmentsin microwavespectroscopyandthe related theory2'-10 have providedpowerfulnewtools for the studyof this phenomenon. Crystalline Solids Atoms and molecules are composed in 3D. free from the influences of intermolecular forces from other substances nearby). Vancomycin is an antibiotic (originated in 1956), and could “vanquish” every strain of gram-positive bacteria thrown at it. Covalent bonds are one example of an intramolecular force. Structure CH3CH3 CH3CH2Cl CH3CH2OH mp (oC) -172 -138. Everything said there applies equally to the alkenes. intermolecular forces of attraction than those of o- and m- isomers. The answer is: CH4, C2H6, C3H8, CH3COOH 2. attractive forces that must be overcome are hydrogen bonding and dispersion forces. If two functional groups are on the same side of the molecule in a cis-isomer, they can sometimes interact causing a chemical reaction. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. The water molecules are thus attracted strongly to one another and exhibit a relatively large surface tension, forming a type of "skin" at its surface. Which statement about chlorine atoms gives an explanation of this? A They achieve high activation energies by absorbing ultraviolet radiation. • Melting points of the hydrogen halides increase in the order HCl < HBr < HF < HI. so, all these molecules have the same size and weight so thats ruled out. eu 13 Copyright © 2011 Pearson Education, Inc. E) There is no general rule to predict covalency in bonds. 5 points 47. Ouellette, J. It has an ether-like odor and bitter taste. E) H3C–CH2–C H3. c) ch3ch2oh and h2o. Section: 2. Why is this the case? I would have tho. Viscosities of fluids are affected by: Type of functional group. In descending order of strength, they include hydrogen bonding, dipole-dipole interactions, and van der Waals forces. no intermolecular interaction exists. What is the intermolecular force present in br2? Ion−Ion forces are much stronger than any intermolecular forces. An important type of dipole-dipole forces are hydrogen bonds. C) H3C–CH3. (b) Both chloroethane and acetone are polar. a high heat of vaporization D. Explain your reasoning. Bond dissociation energy is often used as a measure of the strength of a chemical bond and to compare different bonds. A covalent bond forms when the bonded atoms have a lower total energy than that of widely separated atoms. instead of OH- and Cl-. CH3CCl3, CH3CH2Cl, NaCl, CCl3CH2OH. A certain gaseous oxide of sulfur has an effusion rate that is … will exhibit the strongest dipole-dipole intermolecular force with … CH2Cl2) 20. Ethane Chlorine Chloromethane (78%) Hydrogen chloride Section 4. The dipolar groups include main chain NH and CO groups as well as the polar groups of Ser, Thr, Asn, Gln, Tyr, and Trp side chains. Hydrogen bonding is a type of intermolecular force that gets formed when a compound has hydrogen atom directly attached to highly electro-negative N, F or O atom. Which has the strongest intermolecular forces of attraction? 1. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical. Explain, in complete sentences, how you determined the order for each set. Chapter1SS009-08-4MULTIPLECHOICEQUESTIONSSolomonsChapterAnswersonpages17-18Topic:Intermolecularforces1. Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. a) Strongest of the 3 intermolecular forces but covalent network and ionic bonds are still much stronger. Families of Carbon Compounds Functional Groups, Intermolecular Forces, & Infrared (IR) Spectroscopy Created by Professor William Tam & Dr. butylphenyl ether, Name the compound CH3CH2OCH2CH2CH3. • Melting points of the hydrogen halides increase in the order HCl < HBr < HF < HI. The water molecules are thus attracted strongly to one another and exhibit a relatively large surface tension, forming a type of "skin" at its surface. Ethane (CH3CH3) has a melting point of -183 Cand a boiling point of -89 C. Hydrogen bonding is a type of intermolecular force where the electronegativity difference in the oxygen atom causes a partial permanent dipole to form between the hydrogen and oxygen atoms (shown in the dashed lines). As you learned in school, these coulombic forces (as they are often called) cause opposite charges to attract and like charges to repel. What intermolecular forces hold base pairs together in DNA? A) Ion-ion B) Dipole-dipole C) Hydrogen bonds D) Dispersion forces E) Covalent bonds Ans: C 76. The various, very. (b) Both chloroethane and acetone are polar. Group 2 4 7 Reactions. E – The negative tests suggest that the unknown is a covalent network, metallic, or non-solubility ionic compound. dipole-dipole II. Revision Functional Groups and Organic Chemistry IB Chemistry - Revision What is the name of the functional group in the following? O CH3 O – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. You will find the way geometric isomerism affects melting and boiling points explained towards the bottom of the page you get to by. a) h2s and ch4. So, it contains only dispersion forces. Phillis Chang. 6 atm, substance D must be heated to about 60˚C 25. NW + 1 more educators. An intermolecular force is an attractive force that arises between the positive components (or protons) of one molecule and the negative components (or electrons) of another molecule. 08 g mol-1) from a solid at -154. Hydrogen sulfide and water boil at -60. PH2 OCS HF NO2 SH2 C3H4_C2v H2O2 CH3CH2Cl isobutane CH3COF HCOOH CH3ONO C5H8 2-butyne SH NF3 HOCl CS2 P2 C. (CH3)3CCH3 III. b answer because of the fact of hydrogen bonding between the patial + charge of hydrogen and partial adverse charge of oxygen. 00794*2 + 15. Identify the intermolecular forces (dipole-dipole, London dispersion, hydrogen bonding) that influence the properties of the following compounds. The electron distribution in that molecule is described as unequally shared valence electrons. Download All chapters of Organic Chemistry 11th Edition by Solomons Fryhle Snyder Test Bank Only 19. 69 D), and so it exhibits all three of the van der Waals forces: Keesom forces (dipole-dipole attraction), Debye forces (induced attraction) and London dispersion forces (which all molecules exhibit). Phillis Chang. E) There is no general rule to predict covalency in bonds. ; Intermolecular forces are weaker than intramolecular forces. d) nh3 and ch4. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. The only intermolecular force that acts upon Diethyl Ether is Dispersion. 07) 11 /22 /10 1: 37 PM 8A (18 ) Helium He 3A (13 ) 4A (14 ) 5A (15 ) 6A (16 ) 7A (17 ) 4. CH3CH2OH - will have the highest boiling point because of the presence of an O-H bond. Intermolecular Forces. You can write a book review and share your experiences. Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. Polar molecules attract each other with dipole-dipole in. CH 102: EXAM 1. The dipolar groups include main chain NH and CO groups as well as the polar groups of Ser, Thr, Asn, Gln, Tyr, and Trp side chains. Students will use the Intermolecuar Forces Investigation handout to guide them trhough the process. The smallest (CH4) likely has the weakest intermolecular forces. Viscosities of fluids are affected by: Type of functional group. the given compounds are all covalent, so you should consider which compounds can hydrogen bond, which compounds are the most polar, etc. Intermolecular forces exist between dipoles (like hydrogen bonds), between dipoles and induced dipoles (like Ar and HCl) and between induced dipoles. 5 CH3CHO CH3CO2H CH3CO2Na-121 16. Predict the melting and boiling points for methylamine (CH3NH2). A) CH4 B)CH3CH3 C) CH3CH2Cl D) CH3CH2OH **I know High Intermolecular force = High boiling point!** My question is if A, B & C are dipole-dipole, and D is hydrogen bonding. CH 3OCH 3 C. Dispersion forces tend to be weaker than dipole-dipole interactions, unless the dipoles are very small. free from the influences of intermolecular forces from other substances nearby). In this video Paul Andersen explains the importance of intermolecular forces in chemistry. The water molecules have strong intermolecular forces of hydrogen bonding. A cis alkene is more polar than a trans alkene, giving it a slightly higher boiling point (10. The intermolecular forces present in C H 3 C H 2 C l should be identified. now we look for the longer molecule. Intra and Intermolecular Bondin : A Review of Unit 3 and 4 Blk. A cation can attract the partially negative end of a neutral polar molecule, while an anion attracts the positive end of a polar molecule. 57) MULTIPLE CHOICE. Intermolecular forces hold molecules together. You will find the boiling points of the alkanes explained in some detail on the introductory alkanes page. Like any other hydrocarbons, alkenes burn in air or oxygen, but these reactions are unimportant. Boiling point of a compound increases with increases in intermolecular forces. CE=0 for reference to (halide) ions Ignore molecular mass QoL for clear reference to the difference in size of the force between molecules Penalise M2 if covalent bonds are broken A2 AQA Chemistry 2420 June 2010 CHEM2 Q07. What intermolecular force exists between the CH3CH2CH3 , CH4 , or the "CH3CH2" end of the ethanol molecule and the water molecules? A. Explain your reasoning. Typically, the pi bond breaks and the electrons from it are used to join the two carbon atoms to other things. The individual. dipole-dipole forces. Arrange the compounds in order of increasing boiling point. 1331 - CHAPTER 11 QUESTIONS IGNORE QUESTIONS 3, 10, 37 onwards Intermolecular Forces 1. It exhibits London dispersion forces, dipole-dipole attraction and hydrogen bonding. and the enthalpy of vaporization of CS2(l) to be 28 kJ/mol. Is used to explain the fact that the four bonds in methane are equivalent. Concept: Intermolecular Forces II: Coulomb's Law and IM Forces Concept Overview: Without intermolecular forces, liquids and solids would not exist. Hydrogen bonding is a type of intermolecular force where the electronegativity difference in the oxygen atom causes a partial permanent dipole to form between the hydrogen and oxygen atoms (shown in the dashed lines). B) SO2: 13) Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force. Intermolecular forces hold molecules together. However, acetone forms hydrogen bonds to water much more effectively than chloroethane does, resulting in greater solubility of acetone in water. now we look for the longer molecule. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. Coulombic forces are involved in all forms of chemical bonding; when they act between separate. forces than CH 3OH, so it has the highest boiling point. Toxic by inhalation. Ion-dipole. However, when you compare intermolecular forces to each other, you can see based on what I mentioned above that London dispersion forces are the weakest, followed by dipole-dipole forces, and then hydrogen bonds are the strongest. As the temperature of a liquid is increased, the vapor pressure of the liquid decreases. Answer all questions. CH3Br or CH3Cl I chose: CH3Cl 2. How size of the intermolecular force affects energy needed The forces between bromine I Bra molecules are (than the forces between chlorine I C12 molecules leading to more energy needed to separate the molecules) (or converse) OR brom ne I Br2 has intermolecular forces (or converse) Initiation M2 First propagation Cl. (b) Both chloroethane and acetone are polar. List the following from lowest to highest boiling point: water. An ion-dipole force is a type of intermolecular force in which forces of attraction or repulsion occur between neighboring ions, molecules or atoms. (c) Butane is non-polar and cannot form hydrogen bonds; 1-propanol is polar and can form hydrogen bonds. Explain this trend. C Increased branching reduces the strength of the intermolecular hydrogen bonding. Since during melting or dissolution, the crystal lattice breaks, therefore a larger amount of energy is needed to melt or dissolve the p- isomer than the corresponding o- and meta isomers. Higher energy is required to break down the intermolecular forces among the molecules of 1-bromobutane. Because these two molecules have dipoles, they will have dipole-dipole interactions. • Alkanes have covalent bonds within molecules and intermolecular van der waals forces • A branched chain alkane has a lower Mt than straight chain isomer as branched chain alkanes can’t pack as closely together and have smaller molecular surface areas so van der waals forces are reduced. Is used to explain the fact that the four bonds in methane are equivalent. The intermolecular forces present in CH 3 CH 2 OH are: (a) dispersion forces only, (b) dipole-dipole forces only, (c) dispersion forces and dipole-dipole forces only, (d) dispersion forces, dipole-dipole forces, and hydrogen bonding, (e) hydrogen bonding only. 1021/cr990046e. E – The negative tests suggest that the unknown is a covalent network, metallic, or non-solubility ionic compound. … List all the intermolecular forces present in pure acetone. Various physical and chemical properties of a substance are dependent on this force. Based on your knowledge of intermolecular forces, which of the following would you expect to have the highest boiling point? CH3CH2Cl b. O-H bonds are capable of Hydrogen Bonding. Intermolecular Forces - Hydrogen Bonding, Dipole-Dipole, Ion-Dipole, London Dispersion Interactions - Duration: 45:36. 4) All are correct. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. CH3CH2Cl d. What intermolecular forces hold base pairs together in DNA? A) Ion-ion B) Dipole-dipole C) Hydrogen bonds D) Dispersion forces E) Covalent bonds Ans: C 76. Chemistry II Intermolecular Forces: London Dispersion Forces ­ Instantaneous dipoles that occur spontaneously and fleetingly in a given atom and induce similar dipoles in neighboring atoms. dispersion IV. a substance, in the gaseous state. Place in order of DEC strength of intermolecular forces I. The melting point of a substance increases as the strength of its intermolecular increases. Hydrogen sulfide and water boil at -60. Use dashed lines to show the IMF. All intermolecular forces exist due to some kind of charge-charge attraction--areas of positive charge attract areas of negative charge. Chapter Questions. Get an answer for 'CH3CH2CH3, CH3CH2CH2OH, CH3CH2OCH3 List them in order from highest to lowest in terms of boiling points and highest to lowest terms of their solubility in a polar solvent. Hydrogen Bonds: H atom must be attached directly to a N, O, or F. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. There are two types of atomic bonds - ionic bonds and covalent bonds. 811 Aluminum 13 12. Based on your knowledge of intermolecular forces, which of these would you expect to have the highest boiling point: a) propanone, or b) 1-propanol IB Chemistry - Revision Show the mechanism of the reaction between C3H6 + HBr. 49) Primary and secondary amines exhibit hydrogen bonding; tertiary amines do not. 14) Of the following common organic solvents which one is. A) CH4 B)CH3CH3 C) CH3CH2Cl D) CH3CH2OH **I know High Intermolecular force = High boiling point!** My question is if A, B & C are dipole-dipole, and D is hydrogen bonding. A) Cl2: 12) Choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force. Ouellette, J. Substance A b. remember that the biggest factor in a compound's boiling point is the strength of its intermolecular forces (more IMF = harder to evaporate = higher bp). 2 Names and Identifiers. (a) Xenon has a higher boiling point than neon has. CH3CH2CH2CH2CH2CH3 II. As the number of atoms composing the molecules in this homologous series increases, so does the extent of intermolecular attraction via dispersion forces and, consequently, the energy required to overcome these forces and vaporize the liquids. These forces are the only intermolecular forces that occur between non-polar molecules. Intermolecular Forces. Because of this, comparatively weak intermolecular forces exist for H2S and the melting and boiling points are much lower than they are in water. The Organic Chemistry Tutor 624,636 views 45:36. Why is this the case? I would have tho. Revision Functional Groups and Organic Chemistry IB Chemistry - Revision What is the name of the functional group in the following? O CH3 O – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. instead of OH- and Cl-. Note that here, the term "Intermolecular Force" is a misnomer , even though it is commonly used, as these are the forces between ions with molecules possessing a. Hydrogen bonding is found in situations represented by D-H---A where both the donor atom, D, and the acceptor atom, A, are one of the highly electronegative elements O, N, or F. Water and ethyl alcohol will both have dipole-dipole interactions. Benzene's Structure The simplest arene is benzene. In addition to ion-dipole forces, there are three. with the aid of distruption of intermolecular forces that exist in water upon freezing. Bonding *Lewis Dot Structure: #valence electrons = group number *Atoms want to achieve a stable octet noble gas configuration. no intermolecular interaction exists. A bond forms when the bonded atoms have a lower total energy than that of widely separated atoms. Selected Answer: True Answers: True False Question 8 1. Whether two atoms can form a covalent bond. Intermolecular Forces. Arrange the compounds in order of increasing boiling point. Hydrogen bonding, dispersion forces, and dipole forces are examples of intermolecular forces. the number of carbon atoms bonded to the double bond. CH3CH2CH2OH is a polar molecular compound. • Alkenes have weak intermolecular forces, giving them low mp's and bp's, and making them water insoluble. Which of the following can be re-melted time and again without producing any change? 1) Thermosetting polymers 2) Thermoplastic polymers 3) Bakelite 4) Melamine-formaldehyde polymer 38. 57) MULTIPLE CHOICE. 6 atm, substance D must be heated to about 60˚C 25. Since these intermolecular forces are weak, the molecules are readily separated. asked by Tc on July 2, 2011 Chemisty. CH3CH2OH b. CH3Br or CH3Cl I chose: CH3Cl 2. They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. This happens because the strength of the intermolecular forces between the molecules is affected by the orientation of the polar (dipole) bonds. Methanol is a polar molecule (1. Since Br is better leaving group. Is used to explain the fact that the four bonds in methane are equivalent. Explain your reasoning. how can i determine. As well as hydrogen bonding, intermolecular forces include van der Waals dispersion forces and dipole-dipole interactions. CH3CH2CH2OH falls into this category. Discussion Questions. Discrete molecules retain molecular identity, and such molecules would act like distinct units of matter. Families of Carbon Compounds Functional Groups, Intermolecular Forces, & Infrared (IR) Spectroscopy Created by Professor William Tam & Dr. 49) Primary and secondary amines exhibit hydrogen bonding; tertiary amines do not. remember that the biggest factor in a compound's boiling point is the strength of its intermolecular forces (more IMF = harder to evaporate = higher bp). So the actual trend here is H2S. Because these two molecules have dipoles, they will have dipole-dipole interactions. Used to make pharmaceuticals and as a solvent. For each of the following, state which of these forces of attraction occur in the liquid compound. com CH3CH2Cl- although Cl is incapable of forming hydrogen bonds, there is still some polarity of the C-Cl bond that allows for some intermolecular forces between molecules. (D) the smaller the deviation from ideal gas behavior. However, acetone forms hydrogen bonds to water much more effectively than chloroethane does, resulting in greater solubility of acetone in water. AP Chemistry Practice Test: Chs. CH3CH2OH b. CH3CH2CH3, CH3CH2COOH, CH3CH2CH2NH2, CH3CH2OCH3. butylphenyl ether, Name the compound CH3CH2OCH2CH2CH3. com CH3OCH3 CH3CH2NH2 CH3CH2Br 1 Remembering General Chemistry: Electronic Structure and Bonding To stay alive, early humans must have been able to distinguish between different kinds of ­materials in their world. 1-propanol can interact with water by both dipole-dipole forces and hydrogen bonds. Molecular compounds , sometimes called covalent compounds, display a wide range of physical properties due to the different types of intermolecular attractions such as. Strengths of intermolecular forces. They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. A) H2S AND CH4 B) CH3CH3 AND H2O C) CH3CH2OH AND H2O D) NH3 AND CH4. IB Chemistry - Revision What is the alcohol used in antifreeze? Based on your knowledge of intermolecular forces, which of these would you expect to have the highest boiling point: a) propanone, or b) 1-propanol IB Chemistry - Revision Show the mechanism of the reaction between C3H6 + HBr. Intermolecular forces hold molecules together. Intermolecular forces - van der Waals forces 136. asked by Tc on July 2, 2011 Chemisty. forces than CH 3OH, so it has the highest boiling point. Here HOCH2CH2OH>CH3CH2OH>CH3CH2Cl [order of intermolecular forces]Due to two hydroxyl groups there is strong hydrogen bonding compared to one hydroxyl group and one chloride group. This skin can support a bug or paper clip if gently placed on the water. forces also include dipole forces. Alcohols and Thiols share some similarity i. 14) Of the following common organic solvents which one is. (a) Xenon has a higher boiling point than neon has. 23 Compound Q contains three double bonds per molecule. the given compounds are all covalent, so you should consider which compounds can hydrogen bond, which compounds are the most polar, etc. CH3OCH3 has the lowest boiling point because the intermolecular forces are primarily due to weak van der Waals bonds with no hydrogen bonding component as in the other molecules. Organic Chemistry: Structure, Mechanism, and Synthesis | Robert J. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. The intermolecular forces present in HSCH 2 CH 2 SH include which of the following? I. Intermolecular forces determine a compound's boiling point. ) One point is earned for a correct answer. Based on your knowledge of intermolecular forces, which of the following would you expect to have the highest boiling point? CH3CH2Cl b. More information on molar mass and molecular weight. instead of OH- and Cl-. (ii) pure cyclohexane London dispersion forces One point is earned for London dispersion forces. Asked in Science. However, acetone forms hydrogen bonds to water much more effectively than chloroethane does, resulting in greater solubility of acetone in water. Hydrides forming intermolecular hydrogen bonds have exceptionally high m. For which substances are the dipole dipole attractive forces greatest? Propane, dimethyl ether, are non-polar molecules that would be held together by the London forces, rather than dipole-dipole interactions. com CH3CH2Cl- although Cl is incapable of forming hydrogen bonds, there is still some polarity of the C-Cl bond that allows for some intermolecular forces between molecules. CH3CCl3, CH3CH2Cl, NaCl, CCl3CH2OH. Smaller alkanes have lower boiling points as the Van der Waals Forces are weaker between the molecules so less energy is required to break the Intermolecular Forces; CH3CH2OH + PCl5 -> CH3CH2Cl + POCl3 + HCl. (a) At the temperature and pressure at point 4. A dipole-dipole is an intermolecular force that occurs between two polar molecules. Intermolecular forces determine a compound's boiling point. 76) Which intermolecular force is primarily responsible for the interactions among alkane molecules? Answer: Van der Waal's or London forces Section: 3-9. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. CH3CH2Cl a) induced dipole-induced dipole (London or dispersion) b) dipole-dipole c) hydrogen bonding asked by @nicolep148 • 8 months ago • Chemistry → Intermolecular Forces. Use up arrow (for mozilla firefox browser alt+up arrow) and down arrow (for mozilla firefox browser. dipole-dipole forces. dipole-dipole forces B. Explain this trend. the force is proportional to the displacement, then we can readily solve the equations of motion and find that the vibrational frequencies are related to the force constants and the masses of the atoms. Answer: Both compounds have the same strong intermolecular forces of hydrogen bonding, but methanol's O-H bond is much more polarized than methylamine's N-H as oxygen is more electronegative than nitrogen. Arrange these compounds in order of increasing boiling point: ch4, ch3ch3, ch3ch2cl, ch3ch2oh. Why is this the case? I would have tho. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. Concept Introduction: Intermolecular force is a type of forces that present between one molecule to other molecules as the force of attraction. Substance B c. forces than CH 3OH, so it has the highest boiling point. ; Intermolecular forces are weaker than intramolecular forces. b) Stronger than London forces. intermolecular forces Rank the following substance from highest melting point to lowest melting point. CH3OCH3 has the lowest boiling point because the intermolecular forces are primarily due to weak van der Waals bonds with no hydrogen bonding component as in the other molecules. The various, very. a substance, in the gaseous state. This causes regions of both of these molecules that have partial negative charges and other regions wind up with. Answer: Intermolecular forces are the forces of attraction and repulsion that act between molecules or ions to influence the physical properties of compouds. Is used to explain the fact that the four bonds in methane are equivalent. sulfur emergers to be a larger element compared to that of oxygen, the length of C–S bond is more than that of C–O bond. 48 ppm and 3. b answer because of the fact of hydrogen bonding between the patial + charge of hydrogen and partial adverse charge of oxygen. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. For the vapor pressure/temperature diagram shown, approximate the normal boiling points for: a. Intra and Intermolecular Bondin : A Review of Unit 3 and 4 Blk. notice that the radicals recycle chain length, n: the number of times the cycle of chain propagation. free from the influences of intermolecular forces from other substances nearby). The Organic Chemistry Tutor 624,636 views 45:36. The intermolecular forces of propanol are hydrogen bonding, dipole-dipole forces and London dispersion forces. (C2H5)-O-(C2H5) ethane di ether. Identify the type(s) of intermolecular attractive forces in (i) pure glucose Hydrogen bonding OR dipole-dipole interactions OR van der Waals interactions (London dispersion forces may also be mentioned. (b) Bromine (Br2) molecules are nonpolar. Answer all questions. The only intermolecular force that acts upon Diethyl Ether is Dispersion. Concept Introduction: Intermolecular force is a type of forces that present between one molecule to other molecules as the force of attraction. In contrast, intramolecular forces act within molecules. calculate the frequency, downfield from TMS, of each absorption. eu 13 Copyright © 2011 Pearson Education, Inc. 76) Which intermolecular force is primarily responsible for the interactions among alkane molecules? Answer: Van der Waal’s or London forces. Hydrogen fluoric acid, HF is polar compound. Imagine the forces are like double sided tape and. a high critical temperature E. Intermolecular forces are mainly three types: Dipole-dipole interaction; Hydrogen bond; London dispersion force. The clathrate is stable at room temperature and atmospheric pressure and can be stored for several weeks without much loss of argon. each element or compound: a. Consulting online information about the boiling points of these compounds (i. link full download: https://bit. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. For which substances are the dipole dipole attractive forces greatest? Propane, dimethyl ether, are non-polar molecules that would be held together by the London forces, rather than dipole-dipole interactions. A cation can attract the partially negative end of a neutral polar molecule, while an anion attracts the positive end of a polar molecule. Tài liệu Bài giảng Organic Chemistry - Chapter 2: Alkanes, Thermodynamics, And Kinetics: CombustionHow warm,how fast?Petroleum!!Chapter 2: Alkanes, Thermodynamics, And KineticsAll Reactions Are Equilibria“Barrier” kcal/molExothermicityCH4 + O2CO2 + 2H2O What governs these equilibria?~20high-213 kcal mol-1Equilibrium lies very much to the right. Describe this reaction, including equations for each step and the role of ultraviolet light. asked by Tc on July 2, 2011 Chemisty. A monosubstituted alkene has one carbon atom bonded to the double bond, a disubstiuted alkene has two carbon atoms bonded to the double bond, etc. • Melting points of the hydrogen halides increase in the order HCl < HBr < HF < HI. B)CH3CH2Cl C)CH3CH2CH3 D)CH3CH2OH E)CH3OCH3 43) 44)Which of the following would have the highest boiling point? A)CH3CH2 O CH2CH2 O CH3 B)CH3CH2 O CH2 O CH2CH3 C)CH3 O CH2CH2CH2 O CH3 D) E)HO CH2CH2CH2CH2 OH 44) 45)Consider the three isomeric alkanes n-hexane, 2, 3-dimethylbutane, and 2-methylpentane. (D) the smaller the deviation from ideal gas behavior. (Choose one). Ethane thiol is thus more involatile than chloroethane because of this intermolecular interaction. To boil molecular compounds the intermolecular forces of the molecules in the liquid phase have to be overcome, but to boil an ionic compound ionic bonds have to be broken. The remaining compounds are polar, but Ch3CH2CH2OH shows greater solubility in water owing to presence of hydrogen bonding. Title: Introduction to organic chemistry 1 Molecules with polar functional groups CH3CH2Cl 64. b) ch3ch3 and h2o. What types of intermolecular interactions are present in pure substances composed of the each of the three molecules below: CH3CH2Cl: CH3CH2NH2:. (CH3)3CCH2CH3. eu 13 Copyright © 2011 Pearson Education, Inc. The electron distribution in that molecule is described as unequally shared valence electrons. Intermolecular forces originate from their interactions between charges, partial charges, and temporary charges on molecules. ch3ch3 + cl2 ® ch3ch2cl + hcl The mechanism of this reaction involves initiation, propagation and termination steps. Institutional Action Basics. hydrogen bonding and induced dipole/induced dipole force e. CH3OH, CH3SH. I know it has to do with bonding and it goes Hydrogen bond, Dipole dipole, and london forces, but I don't. List the following from lowest to highest boiling point: water. smaller ion. Discussion Questions. … dipole force d. The answer is the same, but more general. 3 Difficulty: Medium. The remaining compounds are polar, but Ch3CH2CH2OH shows greater solubility in water owing to presence of hydrogen bonding. HOCH 2CH 2OH B. forces also include dipole forces. Note that here, the term "Intermolecular Force" is a misnomer , even though it is commonly used, as these are the forces between ions with molecules possessing a. They are the average value of the bond enthalpy for the same bond in different molecules. Download All chapters of Organic Chemistry 11th Edition by Solomons Fryhle Snyder Test Bank Only 19. Is it the molar mass of each compound?. Intermolecular forces determine a compound's boiling point. Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This causes regions of both of these molecules that have partial negative charges and other regions wind up with. how can i determine. 3 Difficulty: Medium. Difficulty Level: Easy. The electron distribution in that molecule is described as unequally shared valence electrons. (b) Both chloroethane and acetone are polar. B) SO2: 13) Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force. ion-dipole III. a substance, in the gaseous state. In process 1, hydrogen bonds (or dipole-dipole interactions) in liquid water are overcome to produce distinct water molecules in the vapor phase. Used to make pharmaceuticals and as a solvent. CH3Cl3, CH3Br, CH3CH2Cl, (CH3)2CHCl. dispersion IV. University of Manitoba. Constrained Dipole Oscillator Strength Distributions for CF4, CClF3, CCl2F2, CCl3F, CHF3, CH3F, CH3Cl, CH3Br, CH3I, C2F6, and CCl3CF3 Article in Zeitschrift für Physikalische Chemie 230(10. D Increased branching reduces the strength of the intermolecular van der Waals' forces. Intermolecular Forces. free from the influences of intermolecular forces from other substances nearby). Whether two atoms can form a covalent bond. In our calculations, we took into account two possible pathways for these reactions, i. Ethanol, a lighter molecule, has a normal boiling point of #78# #""^@C#, because here the dipole-dipole interaction is hydrogen-bonding, one of the most potent of all the intermolecular forces. com CH3OCH3 CH3CH2NH2 CH3CH2Br 1 Remembering General Chemistry: Electronic Structure and Bonding To stay alive, early humans must have been able to distinguish between different kinds of ­materials in their world. Rank the following compounds in order of decreasing vapor pressure based on intermolecular forces: a) CH4 b) isopentane C5H12 (2-methyl butane) c) CH3CH2CH2CH2OH d) CH3CH2CH2CH2CH3 you can overlap the choices if they are of the same vapor pressure -if intermolecular force increases, vapor pressure increases -intermolecular forces such as london. Therefore this compound will not be soluble in water. CH3CH2OH - will have the highest boiling point because of the presence of an O-H bond. Bonding *Lewis Dot Structure: #valence electrons = group number *Atoms want to achieve a stable octet noble gas configuration. The values published in tables are usually average bond enthalpies. Despite being considered separate units, bonding forces do exist, such as dipole-dipole interactions. For which substances are the dipole dipole attractive forces greatest? Propane, dimethyl ether, are non-polar molecules that would be held together by the London forces, rather than dipole-dipole interactions. An ion-dipole interaction is the result of an electrostatic interaction between a charged ion and a molecule that has a dipole. on StudyBlue. 5 - In which of the following is intermolecular Ch. a substance, in the gaseous state. Atomic and molecular orbitals, computational chemistry and bonding in solids are also discussed. Plus the molecule as a whole is a little too flexible to have much of a permanent dipole, so what you're really loo. In your explanation, use more than just the pKa values. A monosubstituted alkene has one carbon atom bonded to the double bond, a disubstiuted alkene has two carbon atoms bonded to the double bond, etc. When given a linear molecule I determined its overall structure to be polar. Study 73 Exam 3 flashcards from Kaitlyn W. The melting point of a substance increases as the strength of its intermolecular increases. ; Intermolecular forces are weaker than intramolecular forces. However, acetone forms hydrogen bonds to water much. Topic: Intermolecular forces. Explain your reasoning. Question = Is CH3CH2NH2 polar or nonpolar ? Answer = CH3CH2NH2 is Polar What is polar and non-polar? Polar "In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment. 6 atm, substance D must be heated to about 60˚C 25. • Because a π bond is electron rich and much weaker than a σ bond, alkenes undergo addition reactions with electrophiles (10. To rank items as equivalent, overlap them. A certain gaseous oxide of sulfur has an effusion rate that is … will exhibit the strongest dipole-dipole intermolecular force with … CH2Cl2) 20. Ethanol and formic acid exist in equilibrium with ethyl formate. Dipole Forces - YouTube In this video, Paul Andersen describes the intermolecular forces associated with dipoles. so, all these molecules have the same size and weight so thats ruled out. Bromoethane, also known as ethyl bromide, is a chemical compound of the haloalkanes group. Introduction There are two major classes of organic chemicals aliphatic : straight or branched chain organic substances aromatic or arene: includes one or more ring of six carbon atoms with delocalised bonding. CH3CH2Cl [1] HCl. a high boiling point B. 2CH3CH2OH +HCO2H ⇀↽ HCO2CH2CH3. (or converse) 2 For M1 ignore whether it refers to molecules or atoms. Intermolecular forces determine a compound's boiling point. A cation can attract the partially negative end of a neutral polar molecule, while an anion attracts the positive end of a polar molecule. 00794*2 + 15. dipole-dipole forces. sulfur emergers to be a larger element compared to that of oxygen, the length of C–S bond is more than that of C–O bond. Revision Functional Groups and Organic Chemistry IB Chemistry - Revision What is the name of the functional group in the following? O CH3 O – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow. Types of intermolecular forces include dispersion forces, dipole-dipole attractions and hydrogen bonds. The boiling point of a substance is proportional to the strength of its. Define the following and give an example of each: a. It has the molecular. The answer is the same, but more general. Ion-dipole. I2 is a nonpolar molecular substance; only weak dispersion forces are possible. HOCH 2CH 2OH B. So,the order of boiling points is HOCH2CH2OH>CH3CH2OH>CH3CH2Cl. 1331 - CHAPTER 11 QUESTIONS IGNORE QUESTIONS 3, 10, 37 onwards Intermolecular Forces 1. (ii) pure cyclohexane London dispersion forces One point is earned for London dispersion forces. You will find the boiling points of the alkanes explained in some detail on the introductory alkanes page. Substance B c. hydrogen bonding and induced dipole/induced dipole force e. Intermolecular forces hold molecules together. Dipole) CH3CH2OH: Dispersion + H-bonding C7H16: Dispersion (b) What is the vapor pressure of ethanol at 60°C? 360 mm Hg (c) Considering only carbon disulfide and ethanol, which has the stronger intermolecular forces in the liquid state? Ethanol, since its vapor pressure is always lower at the same temp. (a) Xenon has a higher boiling point than neon has. Methanol is a polar molecule (1. Dispersion forces increase with molecular mass or size. INSTANT DOWNLOAD Organic Chemistry 8th Edition by Bruice - Test Bank Sample Questions Organic Chemistry, 8e (Bruice) Chapter 3 An Introduction to Organic Compounds. and the enthalpy of vaporization of CS2(l) to be 28 kJ/mol. Rate is dependent on stability of carbocation. Phillis Chang Ch. When determining relative acidity, it is often useful to look at the relative basicity of the conjugate bases. Families of Carbon Compounds Functional Groups, Intermolecular Forces, & Infrared (IR) Spectroscopy Created by Professor William Tam & Dr. Whether two atoms can form a covalent bond. S N 2 reactions of 2-fluoroethanol. (i) Step 1: CH2CHCl + H2 → CH3CH2Cl; Step 2: CH3CH2Cl + OH- → CH3CH2OH + Cl-; Allow NaOH or NaCl etc. Intermolecular Forces - Hydrogen Bonding, Dipole-Dipole, Ion-Dipole, London Dispersion Interactions - Duration: 45:36. Boiling and melting points of hydrides depends upon the molar mass (or surface area) of molecules. Strengths of intermolecular forces. The main intermolecular interaction in hydrocarbons is van der Waals forces: the attraction of the electrons of one molecule for the nuclei of another molecule. b) Stronger than London forces. Identify the type(s) of intermolecular attractive forces in (i) pure glucose Hydrogen bonding OR dipole-dipole interactions OR van der Waals interactions (London dispersion forces may also be mentioned. Intermolecular® is the trusted partner for advanced materials innovation. Based on your knowledge of intermolecular forces, which of these would you expect to have the highest boiling point: a) propanone, or b) 1-propanol IB Chemistry - Revision Show the mechanism of the reaction between C3H6 + HBr. Chapter 05: Organic Chemistry - Some Basic Principles and Techniques of Chemistry Part-II book - UNIT 12 ORGANIC CHEMISTRY – SOME BASIC PRINCIPLES AND TECHNIQUES After studying this unit, you will be able to • understand reasons for tetravalence of carbon and shapes of organic molecules; • write structures of organic molecules in various ways; • classify the organic compounds; • name. The intermolecular forces present in CH 3 NH 2 include which of the following? I. Intermolecular Forces. List the following molecules in order of increasing boiling point: Br2, F2, I2, Cl2, Answer. a) Strongest of the 3 intermolecular forces but covalent network and ionic bonds are still much stronger. For the vapor pressure/temperature diagram shown, approximate the normal boiling points for: a. Arrange these compounds in order of increasing boiling point: ch4, ch3ch3, ch3ch2cl, ch3ch2oh. CH3CH2Cl- although Cl is incapable of forming hydrogen bonds, there is still some polarity of the C-Cl bond that allows for some intermolecular forces between molecules. The intermolecular forces present in CH 3 CH 2 OH are: (a) dispersion forces only, (b) dipole-dipole forces only, (c) dispersion forces and dipole-dipole forces only, (d) dispersion forces, dipole-dipole forces, and hydrogen bonding, (e) hydrogen bonding only. For compounds of comparable molecular mass, the more polar the functional group, the stronger the intermolecular forces, the higher the viscosity.

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