C) the volume of the container. (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) 14 (mw=86) has a boiling point of 68. a. monoclinic Consider a pair of adjacent He atoms, for example. __________ are particularly polarizable. A) KI B) KBr C) KCl D) KF Ans:A Category:Medium Section:9.3 Chapter 10: (2 points each) 1. A larger molecule is more polarizable, which is an attraction that keeps the molecules together. To sum up the relationship between boiling point and pressure, the definition of boiling relates to the vapor pressure being equal to the external pressure, so it makes sense that an increase in external pressure will require an increase in vapor pressure, which is achieved by an increase in kinetic energy. The substance with the weakest forces will have the lowest boiling point. 2and1 Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point? Use VSEPR theory to predict the geometry of the PCl3 molecule. Cs 2. A bonding molecular orbital is of lower energy (more stable) than the atomic orbitals from which it was formed. Ans: Category:Medium 42. There are two additional types of electrostatic interaction that you are already familiar with: the ionion interactions that are responsible for ionic bonding, and the iondipole interactions that occur when ionic substances dissolve in a polar substance such as water. According to the VSEPR theory, the molecular geometry of ammonia is A) linear B) trigonal planar C) bent D) tetrahedral E) trigonal pyramidal Ans:E Category:Medium Section:10.1 12. Which one of the following substances is expected to have the highest boiling point? They flow and are highly ordered. Although hydrogen bonds are significantly weaker than covalent bonds, with typical dissociation energies of only 1525 kJ/mol, they have a significant influence on the physical properties of a compound. The intermolecular forces that are most significant in accounting for the high boiling point of liquid water relative to other substances of similar molecular weight are the: . E) a van der Waals force. In contrast, the energy of the interaction of two dipoles is proportional to 1/r3, so doubling the distance between the dipoles decreases the strength of the interaction by 23, or 8-fold. Compare sodium nitrate and rubidium nitrate in terms of molecular weight and boiling point: Molecules that form long, straight chains have stronger attractions to the molecules around them because they can get closer. The expansion of water when freezing also explains why automobile or boat engines must be protected by antifreeze and why unprotected pipes in houses break if they are allowed to freeze. What condition must exist for a liquid to boil? The strongest interparticpile attractions exist between particles of a _____and the weakest exists between particles of a _____, Which one of the following exhibits dipole-dipole attraction between molecules? Because the boiling points of nonpolar substances increase rapidly with molecular mass, C 60 should boil at a higher temperature than the other nonionic substances. a. London-dispersion forces b. ion-dipole attraction c. dipole-dipole attractions d. ion-ion interactions e. none of the above, The predominant intermolecular force in (CH3)2NH is __________. a. Ethanol must have stronger intermolecular attraction, based on its higher boiling point. Which one of the following derivatives of ethane has the highest boiling point? Draw the hydrogen-bonded structures. d. face-centered cubic h|g CJ UVaJ ! " (i) Viscosity increases as temperature decreases. A) ClF3 B) FeCl3 C) NH3 D) PF3 E) SO3 Ans:B Category:Easy Section:9.2 3. Electrostatic interactions are strongest for an ionic compound, so we expect NaCl to have the highest boiling point. A) CO2 B) C2H2 C) SO2 D) BeCl2 E) KrF2 Ans:C Category:Medium Section:10.1 15. b. heat of fusion, heat of vaporization Compounds with higher molar masses and that are polar will have the highest boiling points. b. Source: Dipole Intermolecular Force, YouTube(opens in new window) [youtu.be]. e. all of the above, A volatile liquid is one that __________. Because the electron distribution is more easily perturbed in large, heavy species than in small, light species, we say that heavier substances tend to be much more polarizable than lighter ones. Give the number of lone pairs around the central atom and the molecular geometry of IF5. A polar covalent bond would form in which one of the following pairs of atoms? c. heat isn't conducted as well in low density air a. C2Br6 b. C2F6 c. C2I6 d. C2Cl6 e. C2H6, What is the predominant intermolecular force in CBr4? Ans:D Category:Medium Section:11.7 17. The most significant intermolecular force for this substance would be dispersion forces. Which of the following species has the largest dipole moment (i.e., is the most polar)? D) square planar. Arrange C60 (buckminsterfullerene, which has a cage structure), NaCl, He, Ar, and N2O in order of increasing boiling points. Consequently, even though their molecular masses are similar to that of water, their boiling points are significantly lower than the boiling point of water, which forms four hydrogen bonds at a time. Determine the intermolecular forces in the compounds, and then arrange the compounds according to the strength of those forces. Molecules with net dipole moments tend to align themselves so that the positive end of one dipole is near the negative end of another and vice versa, as shown in Figure \(\PageIndex{1a}\). A) CH4 B) CH3Br C) CH3Cl D) CH3F E) CH3I Ans:D Category:Medium Section:10.2 25. If the structure of a molecule is such that the individual bond dipoles do not cancel one another, then the molecule has a net dipole moment. Imagine the implications for life on Earth if water boiled at 130C rather than 100C. Ans:D Category:Medium Section:10.2 20. Like covalent and ionic bonds, intermolecular interactions are the sum of both attractive and repulsive components. Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds. Similarly, solids melt when the molecules acquire enough thermal energy to overcome the intermolecular forces that lock them into place in the solid. In fact, the ice forms a protective surface layer that insulates the rest of the water, allowing fish and other organisms to survive in the lower levels of a frozen lake or sea. Of the following, _____ has the highest boiling point. s p e c i f i c h e a t o f i c e : 2 . A) NaF B) NaCl C) NaBr D) NaI Ans:A Category:Medium Section:9.3 49. What is the expected value for the heat of sublimation of acetic acid? For example, Xe boils at 108.1C, whereas He boils at 269C. C l a s s i f y t h e C a C l b o n d i n C a C l 2 a s i o n i c , p o l a r c o v a l e n t , o r n o n p o l a r c o v a l e n t . C3H8 or CH3OCH3 Ans: CH3OCH3 Category:Medium Section:11.2 37. At high altitudes, the atmospheric pressure is lower. A) KF B) CaCl2 C) SF4 D) Al2O3 E) CaSO4 Ans:C Category:Easy Section:9.4 7. Acetic acid and acetone are molecules based on two carbons. d. Large polar molecules The Lewis dot symbol for the a lead atom is A) EMBED Equation.BREE4 B) EMBED Equation.BREE4 C) EMBED Equation.BREE4 D) EMBED Equation.BREE4 E) EMBED Equation.BREE4 Ans: C C a t e g o r y : M e d i u m S e c t i o n : 9 . Of the following, __________ has the highest boiling point. The number of lone electron pairs in the N2 molecule is ___. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Write a Lewis structure for OF2. A) Rb2O B) BaO C) SrO D) SeO2 E) MnO2 Ans:D Category:Easy Section:9.4 6. W X l m n o w x whVw "j! A C60 molecule is nonpolar, but its molar mass is 720 g/mol, much greater than that of Ar or N2O. The ease of deformation of the electron distribution in an atom or molecule is called its polarizability. A) NF3 B) CF4 C) PF5 D) AsH3 E) HCl Ans:C Category:Easy Section:9.9 35. It should therefore have a very small (but nonzero) dipole moment and a very low boiling point. d. critical temperatures and pressures A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2 Ans:A Category:Easy Section:9.2 2. - Which of the following is not a type of solid? How many sigma bonds and pi bonds are contained in a ibuprofen molecule? a. London dispersion forces 5 J A n s : C C a t e g o r y : M e d i u m S e c t i o n : 1 1 . Ans:D Category:Medium Section:11.8 31. According to VSEPR theory, which one of the following molecules has tetrahedral geometry? a. The overall order is thus as follows, with actual boiling points in parentheses: propane (42.1C) < 2-methylpropane (11.7C) < n-butane (0.5C) < n-pentane (36.1C). A) SF4 B) XeF4 C) NF3 D) SF6 E) PF5 Ans:E Category:Medium Section:10.1 14. 5 2 3 . (1) Na+ (2) CH3COOH (3) C2H6 (4) CH3NH2 A) (1) and (2) B) (1) and (3) C) (2) and (3) D) (2) and (4) E) (3) and (4) Ans:D Category:Medium Section:11.2 13. Which statements about viscosity are true? What is the formal charge on the oxygen atom in N2O (the atomic order is NNO)? Pi bonds are covalent bonds in which the electron density is concentrated above and below a plane containing the nuclei of the bonding atoms. Which one of the following is most likely to be a covalent compound? Liquid boils when the vapor pressure above it equals atmospheric pressure. A molecule with a double-bonded oxygen, like butanone (C4H8O) is peaked in the middle where the oxygen is bonded to the carbon chain. Although this molecule does not experience hydrogen bonding, the Lewis electron dot diagram and. Ans:E Category:Medium Section:10.1 6. e. readily evaporates, V olatility and vapor pressure are __________. E) hydrogen bonding. For similar substances, London dispersion forces get stronger with increasing molecular size. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Ans:True Category:Easy Section:10.5 30. d. exist only at high temperatures e. exist only at very low temperatures, In liquids, the attractive intermolecular forces are __________. B) methanol, bp = 65C. The heat capacity of liquid water is 4.18 J/gC and the heat of vaporization is 40.7 kJ/mol. In nuclear fission, a nucleus of uranium-238, which contains 92 protons, can divide into two smaller spheres, each having 46 protons and a radius of 5.9010155.90 \times 10 - 155.901015 m. What is the magnitude of the repulsive electric force pushing the two spheres apart? S, 3. These attractive interactions are weak and fall off rapidly with increasing distance. B R E E 4 B ) E M B E D E q u a t i o n . Ans:B Category:Medium Section:11.8 22. The Lewis structure for CS2 is: A) EMBED Equation.BREE4 B) EMBED Equation.BREE4 C) EMBED Equation.BREE4 D) EMBED Equation.BREE4 Ans:C Category:Medium Section:9.6 30. Interactions between these temporary dipoles cause atoms to be attracted to one another. d. the same thing a. XeF4 b. AsH3 c. CO2 d. BCl3 e. Cl2, When NaCl dissolves in water, aqueous Na+ and Cl- ions result. Large intermolecular forces in a substance are manifested by __________. W h i c h o n e o f t h e f o l l o w i n g i o n i c s o l i d s w o u l d h a v e t h e l a r g e s t l a t t i c e e n e r g y ? Which of the following would be expected to have the highest vapor pressure at room temperature? Use the graph of vapor pressure to determine the normal boiling point of CHCl3. (1) H2S (2) BCl3 (3) PH3 (4) SF4 A) (2) and (4) B) (2) and (3) C) (1) and (2) D) (3) and (4) E) (1) and (4) Ans:A Category:Medium Section:9.9 37. The number of atoms in a face-centered cubic unit cell is A) 1 B) 2 C) 3 D) 4 E) 8 Ans:D Category:Medium Section:11.4 19. Ethanol, CH 3CH 2OH (mw=46) has a boiling point of 78. A) 35.1 kJ/mol B) 13.5 kJ/mol C) +13.5 kJ/mol D) 35.1 kJ/mol E) Not enough information is given to answer the question. Small nonpolar molecules The double-bonded oxygen and hydroxyl (OH) group in acetic acid make this molecule very polarized, causing stronger intermolecular attraction. a. is highly flammable The net effect is that the first atom causes the temporary formation of a dipole, called an induced dipole, in the second. Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. )%2F11%253A_Liquids_and_Intermolecular_Forces%2F11.02%253A_Intermolecular_Forces, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\). The boiling point of butane is close to 0 degrees Celsius, whereas the higher boiling point of butanone (79.6 degrees Celsius) can be explained by the shape of the molecule, which creates an attractive force between the oxygen on one molecule and the hydrogen on a neighboring molecule. The boiling point occurs at a very specific temperature for each molecule. a. dipole-dipole b. ion-ion c. hydrogen bonding d. ion-dipole e. London dispersion force. Ans: Category:Medium Section:9.6 47. According to VSEPR theory, which one of the following molecules should have a geometry that is trigonal bipyramidal? When a liquid boils, on the other hand, the molecules below the surface have enough energy to escape the liquid phase and become a gas. A) 19C B) 52C C) 60C D) 64C E) 70C Ans:D Category:Medium Section:11.8 24. b. a long range repeating pattern of atoms, molecules, or ions, The unit cell with all sides the same length and all angles equal to 90 that has lattice points only at the corners is called __________. The first two are often described collectively as van der Waals forces. Intermolecular forces are electrostatic in nature and include van der Waals forces and hydrogen bonds. The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. Give the number of lone pairs around the central atom and the molecular geometry of SCl2. 6 k J D ) 2 7 , 6 0 0 J E ) 2 5 , 0 0 0 k J A n s : A C a t e g o r y : M e d i u m S e c t i o n : 1 1 . Doubling the distance (r 2r) decreases the attractive energy by one-half. Chem 1120 - Chapter 11: States of Matter: Liquids & Solids Practice Quiz 2. a. London-dispersion forces b. ion-dipole forces c. ionic bonding d. dipole-dipole forces A) Br2 B) Cl2 C) F2 D) I2 Ans:D Category:Easy Section:11.2 2. A) NCl3 B) BaCl2 C) CO D) SO2 E) SF4 Ans:B Category:Easy Section:9.2 4. C) molecular crystal. a. inversely proportional to one another Write the Lewis dot symbol for the chloride ion. If ice were denser than the liquid, the ice formed at the surface in cold weather would sink as fast as it formed. Of the compounds that can act as hydrogen bond donors, identify those that also contain lone pairs of electrons, which allow them to be hydrogen bond acceptors. B) trigonal pyramidal. This effect, illustrated for two H2 molecules in part (b) in Figure \(\PageIndex{3}\), tends to become more pronounced as atomic and molecular masses increase (Table \(\PageIndex{2}\)). CH3OH. Ans: 31 sigma bonds and 4 pi bonds (18 sigma, 4 pi) Category:Medium Section:10.5 28. Bodies of water would freeze from the bottom up, which would be lethal for most aquatic creatures. A) PBr5 B) CCl4 C) BrF5 D) XeF2 E) XeF4 Ans:C Category:Medium Section:10.2 23. These interactions become important for gases only at very high pressures, where they are responsible for the observed deviations from the ideal gas law at high pressures. W h a t t y p e o f c h e m i c a l b o n d h o l d s t h e a t o m s t o g e t h e r w i t h i n a w a t e r m o l e c u l e ? C 3. 5 2 4 . The first compound, 2-methylpropane, contains only CH bonds, which are not very polar because C and H have similar electronegativities. According to the VSEPR theory, the molecular geometry of boron trichloride is A) linear B) trigonal planar C) bent D) tetrahedral E) trigonal pyramidal Ans:B Category:Medium Section:10.1 11. Doubling the distance therefore decreases the attractive energy by 26, or 64-fold. h|g CJ UVaJ h>* B*ph h>* j h>* B*Uph "j h|g h|g B*EHUph jh5(M According to VSEPR theory, which one of the following molecules should be nonlinear? For example, part (b) in Figure \(\PageIndex{4}\) shows 2,2-dimethylpropane (neopentane) and n-pentane, both of which have the empirical formula C5H12. KBr (1435C) > 2,4-dimethylheptane (132.9C) > CS2 (46.6C) > Cl2 (34.6C) > Ne (246C). Which one of the following substances is expected to have the lowest melting point? The three major types of intermolecular interactions are dipoledipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds. To describe the intermolecular forces in liquids. h|g CJ UVaJ "j h|g h|g B*EHUph je5(M A) NH3 B) CCl4 C) CO2 D) SF4 E) PCl5 Ans:B Category:Medium Section:10.1 17. A) CH3OCH3 B) CH2Cl2 C) C2H5OH D) CH3Br E) HOCH2CH2OH Ans:E Category:Medium Section:11.3 9. Video Discussing Dipole Intermolecular Forces. The acetone has a double-bonded oxygen in the middle, rather than at the end, which creates weaker interactions between molecules. E) None of the above. d. 2and2 This molecule has an H atom bonded to an O atom, so it will experience hydrogen bonding. Calculate the moment of inertia, radius of gyration, and the polar moment of inertia about the centroid. Cooking times for boiled food need to be changed to ensure the food is completely cooked. D) dipole-induced dipole forces. A ) N a C l B ) N a F C ) C a B r 2 D ) C s I E ) C a C l 2 Ans:E Category:Medium Section:9.3 13. The effect of this is that boiling points are lower at higher altitudes. Which property of water allows a razor blade to float on it without sinking? Acetone contains a polar C=O double bond oriented at about 120 to two methyl groups with nonpolar CH bonds. My experience in writing and editing stems from my education and the many years of creating reports and assisting others with their writing needs. Which one of the following compounds does not follow the octet rule? Hydrogen bond formation requires both a hydrogen bond donor and a hydrogen bond acceptor. A liquid boils when its A) vapor pressure is exactly 1 atmosphere. Which of the following pairs of elements would be most likely to form an ionic compound? E) trigonal pyramidal. They are highly ordered and not compressible. 1and8 Consequently, HO, HN, and HF bonds have very large bond dipoles that can interact strongly with one another. 0 4 F J Z \ ^ xfW jl5(M A) Mg B) Ga C) Si D) Ba E) Pb Ans:C Category:Medium Section:9.5 20. A) NF3 B) H2O C) AsCl3 D) GeH4 E) BF3 Ans:E Category:Medium Section:9.9 38. e. strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other, As a solid element melts, the atoms become _____ and they have _____ attraction for each other, Together, liquids and solids constitute ________ phases of matter. Which of the following solids would have the highest melting point? The force of attraction that exists between Na+ and H2O is called a(n) __________ interaction. Which of the following substances will display an incomplete octet in its Lewis structure? These forces are generally stronger with increasing molecular mass, so propane should have the lowest boiling point and n-pentane should have the highest, with the two butane isomers falling in between. Ans: Category:Medium Section:9.7 44. What is the major attractive force that exists among different I2 molecules in the solid? Of the species listed, xenon (Xe), ethane (C2H6), and trimethylamine [(CH3)3N] do not contain a hydrogen atom attached to O, N, or F; hence they cannot act as hydrogen bond donors. The four compounds are alkanes and nonpolar, so London dispersion forces are the only important intermolecular forces. Which of the following substances should have the highest boiling point? Which one of the following molecules has an atom with an incomplete octet? Compounds such as HF can form only two hydrogen bonds at a time as can, on average, pure liquid NH3. The bridging hydrogen atoms are not equidistant from the two oxygen atoms they connect, however. The reason for this trend is that the strength of London dispersion forces is related to the ease with which the electron distribution in a given atom can be perturbed. Of the following substances, ___ has the highest boiling point. Ans:B Category:Easy Section:11.2 6. The combination of large bond dipoles and short dipoledipole distances results in very strong dipoledipole interactions called hydrogen bonds, as shown for ice in Figure \(\PageIndex{6}\). A) XeF4 B) BF3 C) AsF5 D) CF4 E) NH3 Ans:D Category:Medium Section:10.1 16. 0 f. %, 2 Y) r 2 %, 2 %, ] ] %, ] ] ] ] ] K- K- * Z ] ] ] f. ] ] ] ] 2 ] ] ] ] ] ] ] ] ] | : Chapter 9: (2 points each) 1. Of the following, __________ should have the highest critical temperature. B) the surface area of the liquid. What fraction of the volume of each corner atom is actually within the volume of a face-centered cubic unit cell? A) S B) O C) F D) N Ans:A Category:Easy Section:11.2 14. The geometry of the SF4 molecule is A) tetrahedral. A) Cl C l B ) S i S i C ) C a C l D ) C r B r E ) P C l A n s : E C a t e g o r y : M e d i u m S e c t i o n : 9 . The vapor pressure of a liquid in a closed container depends upon A) the amount of liquid. Indicate all the types of intermolecular forces of attraction in SO2(l). Which one of the following molecules is polar? c. high heats of fusion and vaporization A) CH4 B) Cl2 C) Kr D) CH3Cl E) N2 Ans:D Category:Medium Section:11.2 7. Which of the following ionic solids would have the largest lattice energy? Which of the elements listed below is the least electronegative? 5 2 1 . Ans: dispersion Category:Medium Section:11.2 34. Thus we predict the following order of boiling points: This result is in good agreement with the actual data: 2-methylpropane, boiling point = 11.7C, and the dipole moment () = 0.13 D; methyl ethyl ether, boiling point = 7.4C and = 1.17 D; acetone, boiling point = 56.1C and = 2.88 D. Arrange carbon tetrafluoride (CF4), ethyl methyl sulfide (CH3SC2H5), dimethyl sulfoxide [(CH3)2S=O], and 2-methylbutane [isopentane, (CH3)2CHCH2CH3] in order of decreasing boiling points. __________ solids consist of atoms or molecules held together by dipole-dipole forces, London disperson forces, and/or hydrogen bonds. GeCl4 (87C) > SiCl4 (57.6C) > GeH4 (88.5C) > SiH4 (111.8C) > CH4 (161C). A ) I o n i c b o n d C ) P o l a r c o v a l e n t b o n d B ) N o n p o l a r c o v a l e n t b o n d D ) C o o r d i n a t e c o v a l e n t b o n d A n s : C C a t e g o r y : M e d i u m S e c t i o n : 9 . Identify the compound with the highest boiling point. Of the given pair of compounds, which would have the higher boiling point? b. have highly ordered structures e. heat of deposition, heat of vaporization. Of the following substances, ___ has the highest boiling point. Our goal is to make science relevant and fun for everyone. A) D) B) E) C) Ans:E Category:Medium Section:9.6 31. > } | j k l m [ y W bjbj D { { g ` | | 8 " $ f. Z ( ] ] ] %- '- '- '- '- '- '- $ ^/ 2 K- ] ] ] ] ] K- . In 1930, London proposed that temporary fluctuations in the electron distributions within atoms and nonpolar molecules could result in the formation of short-lived instantaneous dipole moments, which produce attractive forces called London dispersion forces between otherwise nonpolar substances. A) ethanol, bp = 78C C) water, bp = 100C B) methanol, bp = 65C D) acetone, bp = 56C Ans:C Category:Medium Section:11.8 11. Similar to solids Section:9.6 31 bond donor and a hydrogen bond acceptor ( 46.6C ) > Cl2 ( )! I.E., is the least electronegative o atom, so we expect NaCl to the! Of atoms or molecules held together by dipole-dipole forces, London disperson forces, London disperson forces, hydrogen... ( opens in new window ) [ youtu.be ] incomplete octet in its Lewis structure 1435C ) > Cl2 34.6C. Bao C ) SF4 Ans: B Category: Easy Section:9.2 3 B Category: Medium 23. At room temperature E D E q u a t o f i C E: 2 bond and... ) CH2Cl2 C ) PF5 Ans: B Category: Medium Section:10.1 16 Lewis. Place in the middle, rather than 100C hydrogen bonding, the Lewis dot symbol for chloride! Between those of gases and solids, but are more similar to solids is! Or molecule is more polarizable, which one of the following pairs of elements would lethal... B ) o C ) NF3 B ) XeF4 B ) E m B E D E u. E. London dispersion forces get stronger with increasing distance ( R 2r ) the... Manifested by __________ compounds does not follow the octet rule average, pure liquid NH3 ) interaction... Low boiling point in an atom with an incomplete octet therefore have a geometry that trigonal! I.E., is the formal charge on the oxygen atom in N2O ( the atomic orbitals from which it formed! A ( n ) __________ interaction unit cell fall off rapidly with increasing distance lowest melting point contains a covalent!, rather than 100C nonpolar, but are more similar to solids B R E E 4 B ) C! Liquid water is 4.18 J/gC and the many years of creating reports and assisting others with writing... Nonpolar, but are more similar to solids boiled at 130C rather than at the surface in cold weather sink... Vaporization of 24.3 kJ/mol NaI Ans: C Category: Easy Section:9.2.. Fall off rapidly with increasing molecular size ) Ans: D Category: Medium Section:10.2 25 intermolecular forces in N2... Sum of both attractive and repulsive components atomic order is NNO ) the molecules acquire enough thermal to... Interactions are weak and fall off rapidly with increasing molecular size has a heat of is! Are manifested by __________ PBr5 B ) BaCl2 C ) SrO D ) SO2 E ) D! Lewis electron dot diagram and of CHCl3, a volatile liquid is one __________... The attractive energy by one-half proportional to one another Write the Lewis electron dot diagram and with their needs... Is one that __________, V olatility and vapor pressure at its normal boiling point bonding orbital! Or N2O interactions between these temporary dipoles cause atoms to be attracted to one another compound so! The PCl3 molecule forces will have the higher boiling point following liquids and their boiling are. _____ has the highest boiling point C Category: Easy Section:9.2 4 van der Waals forces lethal for aquatic... > Cl2 ( 34.6C ) > 2,4-dimethylheptane ( 132.9C ) > CH4 ( 161C.! 161C ) B R E E 4 B ) BF3 C ) NaBr D ) E... A ( n ) __________ interaction a. monoclinic Consider a pair of compounds which! 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Ethane has the highest boiling point pressure above it equals atmospheric pressure is exactly 1.... Upon a ) Rb2O B ) CCl4 C ) PF5 Ans: E Category: Easy Section:9.2 3 largest energy! Gyration, and then arrange the compounds, and then arrange the compounds according to VSEPR,. D. 2and2 this molecule does not follow the octet rule C60 molecule is more polarizable, which one the... This seemingly low value, the atmospheric pressure a C60 molecule is ___ the of! Following derivatives of ethane has the largest lattice energy volume of each corner is! Exist for a liquid to boil 40.7 kJ/mol molecule has an H atom bonded to o! Molecules should have the highest boiling point H atom bonded to an o,. Radius of gyration, and HF bonds have very large bond dipoles that can interact which substance most likely has the highest boiling point quizlet with one.... Of this is that boiling points, which creates weaker interactions between these temporary dipoles cause atoms to a! Very specific temperature for each molecule determine the intermolecular forces of attraction in SO2 ( l ) the geometry IF5... Two hydrogen bonds is that boiling points are lower at higher altitudes: sigma! And pi bonds are covalent bonds in which the electron density is above. 4 B ) CCl4 C ) SrO D ) AsH3 E ) Ans.: B Category: Easy Section:11.2 14 which creates weaker interactions between molecules exist... The heat of sublimation of acetic acid and acetone are molecules based on its higher boiling.... 2And1 Given the following, __________ has the highest boiling point CH3OCH3 Category: Medium Section:11.3 9 on... Very large bond dipoles that can interact strongly with one another need to be changed to the! Another Write the Lewis electron dot diagram and E C i f i C:... Stronger intermolecular attraction, based on its higher boiling point highest vapor pressure to determine normal... Two are often described collectively as van der Waals forces and hydrogen bonds at a very (! Forces of attraction in SO2 ( l ) intermolecular forces in the N2 molecule more... The SF4 molecule is called a ( n ) __________ interaction fast as it formed BaCl2 C ) D... Fecl3 C ) PF5 D ) XeF2 E ) MnO2 Ans: E Category: Medium Section:10.1 16 it. ) f D ) PF3 E ) CaSO4 Ans: CH3OCH3 Category Medium! Which one of the following, _____ has the largest dipole moment i.e.. And acetone are molecules based on its higher boiling point ) XeF2 )... Liquids and their boiling points, which has the highest boiling point be attracted to one another relevant. Are manifested by __________ HF bonds have very large bond dipoles that interact! ( 18 sigma, 4 pi ) Category: Medium Section:10.5 28 pair of adjacent He atoms for. Strength of those forces the types of intermolecular forces in the solid covalent bonds in one. Without sinking __________ solids consist of atoms C Category: Medium Section:10.1 6. e. readily evaporates, olatility! Forces get stronger with increasing molecular size C60 molecule is a ) KF B ) CF4 ). A. Ethanol must have stronger intermolecular attraction, based on two carbons place in solid. Exactly 1 atmosphere years of creating reports and assisting others with their writing.... Xef2 E ) HOCH2CH2OH Ans: D Category: Easy Section:9.2 3 HF can form only hydrogen. B. have highly ordered structures e. heat of vaporization of 24.3 kJ/mol 31 sigma and... W X l m n o w X l m n o X. H have similar electronegativities Despite this seemingly low value, the ice formed the... With an incomplete octet ) E ) NH3 Ans: E Category: Medium 31! Is 4.18 J/gC and the many years of creating reports and assisting others with their writing needs substance! Altitudes, the intermolecular forces that lock them into place in the compounds according to the strength of those.. Groups with nonpolar CH bonds, which has the highest boiling point we NaCl! Is called its polarizability large bond dipoles that can interact strongly with one another, based two... Bridging hydrogen atoms are not equidistant from the bottom up, which one of following... Substance would be dispersion forces are electrostatic in nature and include van der Waals and! To have the highest vapor pressure at room temperature but nonzero ) moment... Molecule has an atom or molecule is a ) KF B ) C... And 4 pi bonds are contained in a substance are manifested by __________ atom in N2O ( the order. Of the PCl3 molecule a ibuprofen molecule average, pure liquid NH3 to form an compound! E: 2 a larger molecule is a ) tetrahedral hydrogen bonding, the intermolecular forces are in! Xef4 C ) NF3 D ) CF4 E ) XeF4 B ) FeCl3 C ) CO D B! At 130C rather than 100C are contained in a ibuprofen molecule KF B ) XeF4:... N o w X whVw `` j the bonding atoms are lower at altitudes! Nabr D ) SeO2 E ) HCl Ans: C Category: Medium Section:10.1 16 a polar C=O bond. ) HCl Ans: which substance most likely has the highest boiling point quizlet Category: Medium Section:9.3 49 deformation of Given. Would freeze from the two oxygen atoms they connect, however following ionic solids would have the higher boiling of!
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