BJU Chemistry Chapter 13 Review

The fact that water is a liquid at room temperature is best explained by the existence of __.

• covalent bonds

• hydrogen bonds

• London dispersion forces

• all the above

The compound NH₃ demonstrates which of the following kinds of intermolecular forces?

• hydrogen bonds

• London dispersion forces

• both a and b

• neither a nor b

If an unknown substance has a low melting point, is soluble only in nonpolar solvents, and is a nonconductor of electricity, it would most likely be __ and held together by __.

• metallic; dispersion forces

• polar; dipole-dipole forces

• nonpolar; hydrogen bonds

• nonpolar; London dispersion forces

If a molecule is polar, it must have a dipole-dipole force as an intermolecular force.

• True

• False

Hydrogen bonds are the strongest of the intermolecular forces.

• True

• False

The electrostatic attractions between molecules are called __.

• ionic bonds

• covalent bonds

• metallic bonds

• intermolecular forces

What occurs when individual molecules leave the surface of a solid and become gaseous?

• Condensation

• Evaporation

• Deposition

• Sublimation

Tags

NGSS.MS-PS1-4

What is released when gaseous particles form crystals?

• Lattice energy

• Heat of fusion

• Sensible heat

• Latent heat

Lattice energy is:

• always expressed as a positive number.

• always expressed as a negative number.

• seldom expressed as a positive number.

• usually expressed as a positive number.

Ionic compounds and metals usually form what type of solids?

• Liquid crystal

• Amorphous

• Crystalline

• Allotropic