2.5 Phase Changes of Matter

Front

What happens to the particles of matter when the temperature increases?

Back

The particles speed up and move farther apart.

Front

What occurs when water freezes into ice?

Back

The water has lost energy.

Front

What phase of matter is characterized by particles that are far apart and move freely?

Back

Gas.

Front

What phase of matter is characterized by particles that are closely packed and vibrate in place?

Back

Solid.

Front

What type of reaction occurs when a hand warmer releases heat?

Back

Exothermic reaction.

Front

What is the process called when a solid turns into a liquid?

Back

Melting.

Front

What is the process called when a liquid turns into a gas?

Back

Vaporization.

Front

What is the process called when a gas turns into a liquid?

Back

Condensation.

Front

What is the process called when a liquid turns into a solid?

Back

Freezing.

Front

What is the term for the energy required to change a substance from solid to liquid?

Back

Heat of fusion.