Mainguy 4.5 Phase Change Final Assessment

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 the addition or removal of energy.

Front

What happens to molecules during a phase change from gas to liquid?

Back

The molecules move closer together and lose energy, resulting in a change from a gas to a liquid.

Front

What is the difference between a solid and a liquid in terms of molecular movement?

Back

In a solid, molecules are closely packed and vibrate in place. In a liquid, molecules are close but can move around each other.

Front

What is the role of energy in phase changes?

Back

Energy is either absorbed or released during phase changes, affecting the movement and arrangement of molecules.

Front

What occurs during melting?

Back

Melting is the phase change from solid to liquid, where heat energy is absorbed, causing molecules to move more freely.

Front

What occurs during freezing?

Back

Freezing is the phase change from liquid to solid, where heat energy is released, causing molecules to become more ordered.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into gas, usually occurring at the surface of the liquid when heat energy is added.

Front

What is condensation?

Back

Condensation is the phase change from gas to liquid, occurring when gas molecules lose energy and come closer together.

Front

How does temperature affect phase changes?

Back

Temperature changes can provide or remove energy, influencing whether a substance is in a solid, liquid, or gas state.

Front

What is the difference between boiling and evaporation?

Back

Boiling occurs throughout the liquid at a specific temperature, while evaporation occurs only at the surface and can happen at any temperature.