States of Matter

Which of the following is an assumption of the KMT for solids?

• elastic collisions

• great amount of space between particles

• particles move in constant random motion

• particles move in fixed positions

Which of the following gas molecules has the highest average velocity if all gases are at the same temperature?

• oxygen

• water

• carbon dioxide

• hydrogen

Which of the following is a physical property of gases?

• high density

• low compressibility

• fluidity

• definite shape

A liquid has ______

• definite shape

• definite volume

• high density

• cannot diffuse

Gases are less orderly than liquids because gases have

• weaker intermolecular forces and lower mobility of particles.

• weaker intermolecular forces and greater mobility of particles.

• stronger intermolecular forces and lower mobility of particles.

• stronger intermolecular forces and greater mobility of particles.

Surface tension accounts for which of the following?

• ability to diffuse

• ability to diffuse

• capillary action

• decreasing surface area

The energy as heat is added, most liquids will eventually

• freeze.

• burn.

• boil.

• diffuse.

If energy as heat is added, most solids will eventually

• freeze

• burn.

• evaporate.

• melt

Crystalline solids has which of the following physical property?

• definite shape

• high diffusion rate

• high compressibility

• not definite volume

The amount of energy required to vaporize one mole of a substance is

• heat of fusion.

• heat of vaporization.

• heat of melting.

• heat of evaporation.