SOLVED

11) Place the following compounds in order of increasing strength of intermolecular forces. CH4CH3CH2CH3CH3CH3 A) CH3CH2CH3 < CH4 < CH3CH3 B) CH3CH2CH3 < CH3CH3 < CH4 C) CH3CH3 < CH4 < CH3CH2CH3 D) CH4 < CH3CH2CH3 < CH3CH3 E) CH4 < CH3CH3 < CH3CH2CH3 12) Place the following compounds in order of decreasing strength of intermolecular forces. I. CH3CH2CH2CH2CH2CH3II. (CH3)3CCH3 III. (CH3)3CCH2CH3 A) III > II > I B) I > III > II C) I > II > III D) II > III > I E) III > I > II 13) Identify the compound that does not have hydrogen bonding. A) (CH3)3N B) H2O C) CH3OH D) HF E) CH3NH2 14) In a liquid, the energy required to increase the surface area by a unit amount is called A) viscosity. B) surface tension. C) dipole-dipole force. D) hydrogen bonding. E) capillary action. 15) Choose the substance with the lowest viscosity. A) Cl3CCCl3 B) Cl2CHCH2Cl C) Cl2CHCHCl2 D) ClCH2CH2Cl E) Cl3CCHCl2 16) Choose the substance with the highest viscosity. A) water at 10°C B) water at 20°C C) water at 30°C D) water at 40°C E) water at 50°C 17) Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube. A) capillary action B) viscosity C) surface tension D) density E) none of the above 18) Describe sweating in humans. A) It is an endothermic reaction. B) The sweat evaporates absorbing heat from the body. C) The skin is cooled. D) None of the above. E) A, B, and C 19) Which of the following statements is true? A) Vapor pressure increases with temperature. B) Hydrogen bonds are stronger than covalent bonds. C) Intermolecular forces hold the atoms in molecules together. D) Dispersion forces are generally stronger than dipole-dipole forces. E) None of the above are true. 20) Identify the place which has the lowest boiling point of water. A) Death Valley, 282 feet below sea level B) a pressurized passenger jet, 35,000 feet C) New Orleans, sea level D) Mt. Everest, 29,035 feet E) Denver, Colorado, 5280 feet