2.2 Phase Changes

The diagram below compares the movement of water particles when the water is cold compared to when it is hot.

• The particles in the cold water move more slowly.

• The particles in the cold water move more quickly.

• The particles in the cold water move more freely.

• The particles in the cold water do not move at all.

This diagram shows the particles that make up three different substances. What state of matter does Substance 1 most likely exhibit?

• solid

• liquid

• gas

• plasma

A container of water is heated to 100°C. At this temperature, what will happen to the water?

• It will boil, and the molecules will move more quickly.

• It will melt, and the molecules will move more slowly.

• It will freeze, and the molecules will move more slowly.

• It will condense, and the molecules will move more quickly.

Which factor is most important for determining the phase in which a substance exists?

• its mass

• its density

• its volume

• its temperature

What will happen to a sample of tap water when it is cooled in a refrigerator?

• The motion of the water particles will speed up.

• The motion of the water particles will slow down.

• The motion of the water particles will stop completely.

• The motion of the water particles will remain the same.

Phase change going from a Liquid to a Gas...

• Vaporization

• Deposition

• Condensation

• Melting

Phase change going from a Gas to a Liquid...

• Sublimation

• Deposition

• Ionization

• Condensation

Phase change going from Liquid to Solid...

• Melting

• Freezing

• Condensation

• Sublimation

Phase change going from a Solid to a Gas...

• Deposition

• Sublimation

• Condensation

• Recombination

Phase change going from a Solid to a Liquid...

• Freezing

• Condensation

• Melting

• Sublimation