Exam 11: Intermolecular Forces and the Physical Properties of Liquids and Solids

Liquid sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633°C and 400.0 torr at 823°C. What is its heat of vaporization?

Which of the following properties indicates the presence of strong intermolecular forces in a liquid?

________ is the name given to the phase change from a solid directly to a gas.

Molecular crystals are held together by the intermolecular forces of dispersion and dipole-dipole forces and by hydrogen bonding.

What is determined by the magnitude of intermolecular forces in a liquid and is a measure of a fluid's resistance to flow?

What is defined as the number of atoms surrounding an atom in a crystal lattice and indicates how tightly the atoms are packed together?

What is another name given to dispersion forces?

________ ________ are characterized by an instantaneous dipole.

What name is given to the curved surface of a liquid contained in a narrow tube?

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

Based on the phase diagram of a pure substance given below, which statement is true?

Based on the phase diagram of a pure substance given below, what is the significance of the point labeled B?

Based on the phase diagram of a pure substance given below, what change of state occurs as the substance changes from point C to point D?

Which is the correct equation for the molar heat of sublimation?

At a temperature of 27 K, neon condenses due to

Which one of the following crystallizes in a metallic lattice?

In a sample of hydrogen iodide, ________ are the most important intermolecular forces.

Identify the dominant (strongest) type of intermolecular force present in Cl₂(l).

The energy required to increase the surface of a liquid per unit area is called the

How many phase changes are represented in the following heating curve of a pure substance?