Phase Changes

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another due to changes in energy and temperature.

Front

What are the main types of phase changes?

Back

The main types of phase changes include melting, freezing, condensation, evaporation, sublimation, and deposition.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature of a substance remains constant during a phase change, even though heat energy is being added or removed.

Front

What is melting?

Back

Melting is the process where a solid turns into a liquid when heat is added.

Front

What is freezing?

Back

Freezing is the process where a liquid turns into a solid when heat is removed.

Front

What is condensation?

Back

Condensation is the process where a gas turns into a liquid when it cools down.

Front

What is evaporation?

Back

Evaporation is the process where a liquid turns into a gas when heat is added.

Front

What is sublimation?

Back

Sublimation is the process where a solid turns directly into a gas without becoming a liquid first.

Front

What is deposition?

Back

Deposition is the process where a gas turns directly into a solid without becoming a liquid first.

Front

How do particle movements differ in solids, liquids, and gases?

Back

In solids, particles are closely packed and vibrate in place; in liquids, particles are close but can move past each other; in gases, particles are far apart and move freely.