Phase Changes

Front

What is a phase change?

Back

A phase change is the transformation of a substance from one state of matter to another, such as solid, liquid, or gas.

Front

What is melting?

Back

Melting is the phase change from a solid to a liquid, occurring when a substance absorbs heat.

Front

What is freezing?

Back

Freezing is the phase change from a liquid to a solid, occurring when a substance loses heat.

Front

What is condensation?

Back

Condensation is the phase change from a gas to a liquid, often occurring when gas cools down.

Front

What is evaporation?

Back

Evaporation is the phase change from a liquid to a gas, occurring when a liquid absorbs heat.

Front

What is sublimation?

Back

Sublimation is the phase change from a solid directly to a gas without becoming a liquid first.

Front

What happens to particles during melting?

Back

During melting, particles in a solid gain energy and begin to move more freely, transitioning into a liquid state.

Front

What happens to particles during freezing?

Back

During freezing, particles in a liquid lose energy and move closer together, forming a solid.

Front

How do solids differ from liquids in terms of particle movement?

Back

In solids, particles are tightly packed and vibrate in place, while in liquids, particles are more loosely packed and can move around each other.

Front

What is the role of energy in phase changes?

Back

Energy is required to be added or removed during phase changes; for example, heat is added for melting and removed for freezing.