Phase Changes

Front

What are phase changes?

Back

Phase changes are transitions between different states of matter (solid, liquid, gas) due to changes in temperature or pressure.

Front

What is melting?

Back

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

Front

What is freezing?

Back

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

Front

What is condensation?

Back

Condensation is the phase change from gas to liquid, occurring when a gas cools and loses energy.

Front

What is sublimation?

Back

Sublimation is the phase change from solid to gas without passing through the liquid phase, often occurring under low pressure.

Front

What is deposition?

Back

Deposition is the phase change from gas to solid without passing through the liquid phase, such as frost forming on a surface.

Front

How do particles behave when heated?

Back

When heated, particles gain energy, move faster, and spread apart.

Front

How do particles behave when cooled?

Back

When cooled, particles lose energy, move slower, and come closer together.

Front

What is the role of energy in phase changes?

Back

Energy is required to be added or removed during phase changes to overcome or establish intermolecular forces.

Front

What happens during evaporation?

Back

Evaporation is the process where liquid turns into gas at the surface, occurring at any temperature.