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

Variable melting point, variable hardness, and good conductor of heat and electricity are properties which describe a(n) ________ crystal.

In the packing of identical atoms with cubic unit cells, the packing efficiency increases as the coordination number increases.

Which one of the following substances crystallizes as a molecular solid?

Which substance will exhibit hydrogen bonding between molecules?

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the first-order (n = 1) diffraction of 0.154-nm X rays from a graphite crystal?

Give an example of an ionic crystal and a metallic crystal which contain an element common to each.

The location that indicates conditions under which two phases can exist in equilibrium is called the

________ ________ is a special type of dipole-dipole interaction.

The strongest intermolecular interactions between hydrogen fluoride (HF) molecules arise from

Use the graph of vapor pressure to determine the normal boiling point of O₂.

The number of atoms in a face-centered cubic unit cell is

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

Which statement is true about phase diagrams?

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Identify the dominant (strongest) type of intermolecular force present in NH₃(l).

The number of atoms in a body-centered cubic unit cell is

Which of the following lacks a regular three-dimensional arrangement of atoms?

Which arrow represents the process of vaporization?

What is the energy in kJ/mol required to melt 1 mole of a solid?

Which substance has the highest vapor pressure at room temperature?