1. Increasing the pressure above a liquid will cause the boiling point of the liquid to: A) Increase B) Decrease C) Remain the same D) Depends on the liquid E) Equal 0 C 2. In a liquid, the attractive intermolecular forces are: A) Weaker than in a substance that is a gas at the same temperature B) Always insignificant and unable to keep molecules close together C) So strong that molecules are locked close together and are unable to move D) Strong enough to hold molecules relatively close but not strong enough to keep molecules from moving past each other 3. The intemolecular force(s) responsible for NH3 having the highest boiling point in the set: NH3,PH3,AsH3,SbH3, is/are: A) Hydrogen bonding B) Dipole-dipole interactions C) Dispersion forces D) Mainly Dispersion forces but also dipole-dipole interactions E) Ion-dipole interactions 4. Which of the following indicates the existence of strong intermolecular forces of attraction in a liquid? A) A very low boiling point B) A very low vapor pressure C) A very low viscosity D) A very low molar heat of vaporization E) None of the above 5. For which of the following species are the dispersion forces strongest? A) C4H10 B) C5H12 C) CeH14 D) C7H16 E) C3H15 6. Which of the following would have the highest melting point? A) H2O B) CO2 C) Br2 D) NaCl E) C3H8 7. Which of the following shows a relatively high boiling temperature due to hydrogen bonding? CHEM102 Home Work 2 Chapter 11: Intermolecular forces and liquids and solids A) CH3OH B) CH3SH C) CH3OCH3 D) SnH4 E) CO2