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Ch 11: Chem Study Packet
front 1 1) Crystalline solids ________. A) have their particles arranged randomly B) have highly ordered structures C) are usually very soft D) exist only at high temperatures E) exist only at very low temperatures | back 1 B) have highly ordered structures |
front 2 2) In liquids, the attractive intermolecular forces are ________. A) very weak compared with kinetic energies of the molecules B) strong enough to hold molecules relatively close together C) strong enough to keep the molecules confined to vibrating about their fixed lattice points D) not strong enough to keep molecules from moving past each other E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other | back 2 E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other |
front 3 3) As a gaseous element condenses, the atoms become ________ and they have ________ attraction for one another. A) more separated, more B) more separated, less C) closer together, more D) closer together, less E) larger, greater | back 3 C) closer together, more |
front 4 4) A gas is ________ and assumes ________ of its container, whereas a liquid is ________ and assumes ________ of its container. A) compressible, the volume and shape, not compressible, the shape of a portion B) compressible, the shape, not compressible, the volume and shape C) compressible, the volume and shape, compressible, the volume D) condensed, the volume and shape, condensed, the volume and shape E) condensed, the shape, compressible, the volume and shape | back 4 A) compressible, the volume and shape, not compressible, the shape of a portion |
front 5 5) Together, liquids and solids constitute ________ phases of matter. A) the compressible B) the fluid C) the condensed D) all of the E) the disordered | back 5 C) the condensed |
front 6 6) Which statement is true about liquids but not true about solids? A) They flow and are highly ordered. B) They are highly ordered and not compressible. C) They flow and are compressible. D) They assume both the volume and the shape of their containers. E) They flow and are not compressible. | back 6 C) They flow and are compressible. |
front 7 7) The strongest interparticle attractions exist between particles of a ________, and the weakest interparticle attractions exist between particles of a ________. A) solid, liquid B) solid, gas C) liquid, gas D) liquid, solid E) gas, solid | back 7 B) solid, gas |
front 8 8) Of the following substances, only ________ has London dispersion forces as the only intermolecular force. A) CH3OH B) NH3 C) H2S D) Kr E) HCl | back 8 D) Kr |
front 9 9) In which of the following molecules is hydrogen bonding likely to be the most significant component of the total intermolecular forces? A) CH4 B) C5H11OH C) C6H13NH2 D) CH3OH E) CO2 | back 9 D) CH3OH |
front 10 10) Which of the following has dispersion forces as its only intermolecular force? A) CH4 B) HCl C) C6H13NH2 D) NaCl E) CH3Cl | back 10 A) CH4 |
front 11 11) When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists between Na+ and H2O is called a(n) ________ interaction. A) dipole-dipole B) ion-ion C) hydrogen bonding D) ion-dipole E) London dispersion force | back 11 D) ion-dipole |
front 12 12) ________ are particularly polarizable. A) Small nonpolar molecules B) Small polar molecules C) Large nonpolar molecules D) Large polar molecules E) Large molecules, regardless of their polarity, | back 12 E) Large molecules, regardless of their polarity, |
front 13 13) The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the ________. A) electronegativity B) hydrogen bonding C) polarizability D) volatility E) viscosity | back 13 C) polarizability |
front 14 14) The intermolecular force(s) responsible for the fact that CH4 has the lowest boiling point in the set CH4, SiH4, GeH4, SnH4 is/are ________. A) hydrogen bonding B) dipole-dipole interactions C) London dispersion forces D) mainly hydrogen bonding but also dipole-dipole interactions E) mainly London-dispersion forces but also dipole-dipole interactions | back 14 C) London dispersion forces |
front 15 15) Elemental iodine (I2) is a solid at room temperature. What is the major attractive force that exists among different I2 molecules in the solid? A) London dispersion forces B) dipole-dipole rejections C) ionic-dipole interactions D) covalent-ionic interactions E) dipole-dipole attractions | back 15 A) London dispersion forces |
front 16 16) Hydrogen bonding is a special case of ________. A) London-dispersion forces B) ion-dipole attraction C) dipole-dipole attractions D) ion-ion interactions E) none of the above | back 16 C) dipole-dipole attractions |
front 17 17) Which one of the following substances will have hydrogen bonding as one of its intermolecular forces? | back 17  |
front 18 18) Which one of the following substances will not have hydrogen bonding as one of its intermolecular forces? | back 18  |
front 19 19) What intermolecular force is responsible for the fact that ice is less dense than liquid water? A) London dispersion forces B) dipole-dipole forces C) ion-dipole forces D) hydrogen bonding E) ionic bonding | back 19 D) hydrogen bonding |
front 20 20) The predominant intermolecular force in (CH3)2NH is ________. A) London dispersion forces B) ion-dipole forces C) ionic bonding D) dipole-dipole forces E) hydrogen bonding | back 20 E) hydrogen bonding |
front 21 21) C12H26 molecules are held together by ________. A) ion-ion interactions B) hydrogen bonding C) ion-dipole interactions D) dipole-dipole interactions E) dispersion forces | back 21 E) dispersion forces |
front 22 22) Which of the following molecules has hydrogen bonding as its only intermolecular force? A) HF B) H2O C) C6H13NH2 D) C5H11OH E) None, all of the above exhibit dispersion forces. | back 22 E) None, all of the above exhibit dispersion forces. |
front 23 23) Which of the following molecules has hydrogen bonding as its only intermolecular force? A) NH3 B) H2O C) C3H7OH D) HOCH2CH2OH E) None, all of the above exhibit dispersion forces. | back 23 E) None, all of the above exhibit dispersion forces. |
front 24 24) What types of intermolecular forces exist between HI and H2S? A) dipole-dipole and ion-dipole B) dispersion forces, dipole-dipole, and ion-dipole C) dispersion forces, hydrogen bonding, dipole-dipole, and ion-dipole D) dispersion forces and dipole-dipole E) dispersion forces and ion-dipole | back 24 D) dispersion forces and dipole-dipole |
front 25 5) What type(s) of intermolecular forces exist between Br2 and CCl4? A) dispersion forces B) dispersion forces and ion-dipole C) dispersion forces and dipole-dipole D) dispersion forces, ion-dipole, and dipole-dipole E) None. Since both are gases at room temperature, they do not interact with each other. | back 25 A) dispersion forces |
front 26 26) What type(s) of intermolecular forces exist between PH3 and CO3 2 -? A) dispersion forces B) dispersion forces and ion-dipole C) dispersion forces, ion-dipole, and dipole-dipole D) dispersion forces and dipole-dipole E) dispersion forces, ion-dipole, dipole-dipole, and hydrogen bonds | back 26 B) dispersion forces and ion-dipole |
front 27 27) What types of intermolecular forces exist between NH3 and H2S? A) dispersion forces and dipole-dipole forces B) dispersion forces C) dispersion forces and hydrogen bonds D) dispersion forces, hydrogen bonds, and dipole-dipole forces E) dispersion forces, hydrogen bonds, and ion-dipole forces | back 27 A) dispersion forces and dipole-dipole forces |
front 28 28) What types of intermolecular forces exist between NH3 and HF? A) dispersion forces and dipole-dipole forces B) dispersion forces and hydrogen bonds C) dispersion forces, dipole-dipole forces, and hydrogen bonds D) dispersion forces E) dispersion forces, hydrogen bonds, and ion-dipole forces | back 28 C) dispersion forces, dipole-dipole forces, and hydrogen bonds |
front 29 29) ________ is the energy required to expand the surface area of a liquid by a unit amount of area. A) Viscosity B) Surface tension C) Volatility D) Meniscus E) Capillary action | back 29 B) Surface tension |
front 30 30) Which statements about viscosity are true? (i) Viscosity increases as temperature decreases. (ii) Viscosity increases as molecular weight increases. (iii) Viscosity increases as intermolecular forces increase. A) (i) only B) (ii) and (iii) C) (i) and (iii) D) none E) all | back 30 E) all |
front 31 31) The shape of a liquid's meniscus is determined by ________. A) the viscosity of the liquid B) the type of material the container is made of C) the relative magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and its container D) the amount of hydrogen bonding in the liquid E) the volume of the liquid | back 31 C) the relative magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and its container |
front 32 32) Viscosity is ________. A) the "skin" on a liquid surface caused by intermolecular attraction B) the resistance to flow C) the same as density D) inversely proportional to molar mass E) unaffected by temperature | back 32 B) the resistance to flow |
front 33 33) How high a liquid will rise up a narrow tube as a result of capillary action depends on ________. A) the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity B) gravity alone C) only the magnitude of adhesive forces between the liquid and the tube D) the viscosity of the liquid E) only the magnitude of cohesive forces in the liquid | back 33 A) the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity |
front 34 34) The property responsible for the "beading up" of water is ________. A) density B) viscosity C) vapor pressure D) surface tension E) hydrogen bonding | back 34 D) surface tension |
front 35 35) Heat of sublimation can be approximated by adding together ________ and ________. A) heat of fusion, heat of condensation B) heat of fusion, heat of vaporization C) heat of freezing (solidification), heat of condensation D) heat of freezing (solidification), heat of vaporization E) heat of deposition, heat of vaporization | back 35 B) heat of fusion, heat of vaporization |
front 36 36) Which of the following statements is false? A) The absolute value of the heat of sublimation is equal to the absolute value of the heat of deposition. B) The heat of sublimation is equal to the sum of the heat of vaporization and the heat of melting. C) The heat of sublimation is equal to the sum of the heat of vaporization and the heat of freezing. D) The absolute value of the heat of sublimation is equal to the absolute value of the sum of the heat of condensation and the heat of freezing. E) The absolute value of the heat of deposition is equal to sum of the absolute value of the heat of vaporization and the absolute value of the heat of freezing. | back 36 C) The heat of sublimation is equal to the sum of the heat of vaporization and the heat of freezing. |
front 37  37) The phase changes B → C and D → E are not associated with temperature increases because the heat energy is used up to ________. A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the velocity of molecules E) increase the density of the sample | back 37 A) increase distances between molecules |
front 38 38) Based on the following information, which compound has the strongest intermolecular forces? Substance ΔH vap (kJ/mol) Argon (Ar) 6.3 Benzene (C6H6)31.0 Ethanol (C2H5OH)39.3 Water (H2O)40.8 Methane (CH4)9.2 A) Argon B) Benzene C) Ethanol D) Water E) Methane | back 38 D) Water |
front 39 39) Which compound has the strongest intermolecular forces? A) CBr4 B) C12H26 C) CI4 D) N2 E) O2 | back 39 C) CI4 |
front 40 40) Large intermolecular forces in a substance are manifested by ________. A) low vapor pressure B) high boiling point C) high heats of fusion and vaporization D) high critical temperatures and pressures E) all of the above | back 40 E) all of the above |
front 41 41) A substance that expands to fill its container yet has a density approaching that of a liquid, and that can behave as a solvent is called a(n) ________. A) plasma B) gas C) liquid D) amorphous solid E) supercritical fluid and gas | back 41 E) supercritical fluid and gas |
front 42 42) The critical temperature and pressure of CS2 are 279 °C and 78 atm, respectively. At temperatures above 279 °C and pressures above 78 atm, CS2 can only occur as a ________. A) solid B) liquid C) liquid and gas D) gas E) supercritical fluid | back 42 E) supercritical fluid |
front 43 43) The substance with the largest heat of vaporization is ________. A) I2 B) Br2 C) Cl2 D) F2 E) O2 | back 43 A) I2 |
front 44 44) Of the following, ________ is an exothermic process. A) melting B) subliming C) freezing D) boiling E) All of the above are exothermic. | back 44 C) freezing |
front 45 45) Of the following, ________ should have the highest critical temperature. A) CBr4 B) CCl4 C) CF4 D) CH4 E) H2 | back 45 A) CBr4 |
front 46 46) A volatile liquid is one that ________. A) is highly flammable B) is highly viscous C) is highly hydrogen-bonded D) is highly cohesive E) readily evaporates | back 46 E) readily evaporates |
front 47 47) In general, the vapor pressure of a substance increases as ________ increases. A) surface tension B) molecular weight C) hydrogen bonding D) viscosity E) temperature | back 47 E) temperature |
front 48 48) The vapor pressure of any substance at its normal boiling point is A) 1 Pa B) 1 torr C) 1 atm D) equal to atmospheric pressure E) equal to the vapor pressure of water | back 48 C) 1 atm |
front 49 49) Volatility and vapor pressure are ________. A) inversely proportional to one another B) directly proportional to one another C) not related D) the same thing E) both independent of temperature | back 49 B) directly proportional to one another |
front 50 50) Some things take longer to cook at high altitudes than at low altitudes because ________. A) water boils at a lower temperature at high altitude than at low altitude B) water boils at a higher temperature at high altitude than at low altitude C) heat isn't conducted as well in low density air D) natural gas flames don't burn as hot at high altitudes E) there is a higher moisture content in the air at high altitude | back 50 A) water boils at a lower temperature at high altitude than at low altitude |
front 51 51) The vapor pressure of a liquid ________. A) increases linearly with increasing temperature B) increases nonlinearly with increasing temperature C) decreases linearly with increasing temperature D) decreases nonlinearly with increasing temperature E) is totally unrelated to its molecular structure | back 51 B) increases nonlinearly with increasing temperature |
front 52 53) On a phase diagram, the critical pressure is ________. A) the pressure required to melt a solid B) the pressure below which a substance is a solid at all temperatures C) the pressure above which a substance is a liquid at all temperatures D) the pressure at which a liquid changes to a gas E) the pressure required to liquefy a gas at its critical temperature | back 52 E) the pressure required to liquefy a gas at its critical temperature |
front 53 54) On a phase diagram, the critical temperature is ________. A) the temperature below which a gas cannot be liquefied B) the temperature above which a gas cannot be liquefied C) the temperature at which all three states are in equilibrium D) the temperature required to melt a solid E) the temperature required to cause sublimation of a solid | back 53 B) the temperature above which a gas cannot be liquefied |
front 54 55) On a phase diagram, the melting point is the same as ________. A) the triple point B) the critical point C) the freezing point D) the boiling point E) the vapor-pressure curve | back 54 C) the freezing point |
front 55 56) When the phase diagram for a substance has a solid-liquid phase boundary line that has a negative slope (leans to the left), the substance ________. A) can go from solid to liquid, within a small temperature range, via the application of pressure B) sublimes rather than melts under ordinary conditions C) cannot go from solid to liquid by application of pressure at any temperature D) cannot be liquefied above its triple point E) melts rather than sublimes under ordinary conditions | back 55 A) can go from solid to liquid, within a small temperature range, via the application of pressure |
front 56 57) The predominant intermolecular force in CaBr2 is ________. A) London-dispersion forces B) ion-dipole forces C) ionic bonding D) dipole-dipole forces E) hydrogen bonding | back 56 C) ionic bonding |
front 57 58) Which of the following is most likely to exhibit liquid-crystalline behavior? A) CH3CH2-C(CH3)2-CH2CH3 B) CH3CH2CH2CH2CH2CH2CH2CH3 C) CH3CH2CH2CH2CH2- D) E) | back 57 e |
front 58 59) Which of the following characteristics would prevent liquid crystal behavior? A) long axial structure B) ionic configuration C) carbon-carbon single bonds D) double bonding E) polar groups | back 58 B) ionic configuration |
front 59 60) In the smectic A liquid-crystalline phase, ________. A) the molecules are aligned along their long axes, with no ordering with respect to the ends of the molecules B) the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well C) the molecules are aligned with their long axes tilted with respect to a line perpendicular to the plane in which the molecules are stacked D) disk-shaped molecules are aligned through a stacking of the disks in layers E) the molecules are oriented in a totally random fashion | back 59 B) the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well |