3.3 Phase Changes

Front

What is vaporization?

Back

The phase change in which a substance changes from a liquid to a vapor (gas).

Front

What is condensation?

Back

The phase change in which a substance changes from a vapor (gas) to a liquid.

Front

What is freezing?

Back

The phase change in which a substance changes from a liquid to a solid.

Front

What is melting?

Back

The phase change in which a substance changes from a solid to a liquid.

Front

What is sublimation?

Back

The phase change in which a substance changes directly from a solid to a vapor (gas) without becoming a liquid.

Front

What is deposition?

Back

The phase change in which a substance changes directly from a vapor (gas) to a solid without becoming a liquid.

Front

What happens to water molecules during melting?

Back

Water molecules move from their fixed positions, allowing the solid to become a liquid.

Front

What happens to water molecules during freezing?

Back

Water molecules become more orderly and move closer together, forming a solid.

Front

What is an exothermic change?

Back

A phase change that releases energy to the surroundings, such as freezing or deposition.

Front

What is an endothermic change?

Back

A phase change that absorbs energy from the surroundings, such as melting or vaporization.