Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

The vapor pressure of ethanol is 400 mmHg at 63.5°C. Its molar heat of vaporization is 39.3 kJ/mol. What is the vapor pressure of ethanol at 34.9°C?

A cylinder contains a liquid which is in equilibrium with its vapor at 45.0^°C. If the piston is moved down to constrict the volume of the cylinder without changing the temperature, the equilibrium vapor pressure of the liquid will increase.

Will a nonpolar molecule will have the strongest intermolecular interaction with another nonpolar molecule, a polar molecule, or an ion in solution? Explain.

Which compound will have the weakest intermolecular forces?

Arrange these compounds in order of increasing vapor pressure at 20 °C:CBr₄, CCl₄, CF₄, CH₄, CI₄.

The following questions refer to the phase diagram below. Gas, liquid, and solid phases are all present, but not labeled. -At the temperature and pressure of point d, which statement below is true?

Given the phase changes: condensation, freezing, fusion, sublimation, and vaporization. Which of these phase changes is/are endothermic?

Which of the following liquids, at the same temperature, has the lowest vapor pressure?

For small molecules of comparable molecular weight, which one of the following choices lists the intermolecular forces in the order of increasing strength?