Phase Change and Heat Review 2024-2025

Front

What is condensation?

Back

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

Front

In which region of a cooling curve would a substance be a solid and a liquid?

Back

Region 2 is where a substance exists as both a solid and a liquid during the phase change.

Front

In which region of a cooling curve would a substance be a gas only?

Back

Region 5 is where a substance exists as a gas only.

Front

Why does an ice cube feel cold in your hand?

Back

An ice cube feels cold because heat flows from your hand to the ice cube, causing your hand to lose energy.

Front

Which phase changes require energy input?

Back

Melting and Vaporization are the phase changes that require energy input.

Front

What is the cooling curve?

Back

A cooling curve is a graph that shows the temperature of a substance as it cools over time, illustrating phase changes.

Front

What happens during melting?

Back

Melting is the phase change from solid to liquid, requiring energy to break the bonds between particles.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into gas at temperatures below boiling point, requiring energy.

Front

What is freezing?

Back

Freezing is the phase change from liquid to solid, releasing energy as particles lose kinetic energy.

Front

What is the difference between boiling and evaporation?

Back

Boiling occurs at a specific temperature throughout the liquid, while evaporation can occur at any temperature.