Endothermic Phase Changes and Concepts

Front

What is deposition?

Back

Deposition is the phase change in which gas transforms directly into a solid without passing through the liquid state.

Front

What happens at the plateau of a phase change graph?

Back

At the plateau, the temperature remains constant while thermal energy is still being added or removed, indicating a phase change is occurring.

Front

What is the heat of fusion?

Back

The heat of fusion is the amount of energy required to change a substance from solid to liquid at its melting point.

Front

What is sublimation?

Back

Sublimation is the phase change in which a solid changes directly into a gas without becoming a liquid first.

Front

What is vaporization?

Back

Vaporization is the phase change in which a liquid turns into a gas, which can occur through boiling or evaporation.

Front

What is condensation?

Back

Condensation is the phase change in which a gas turns into a liquid, typically when it cools down.

Front

What is freezing?

Back

Freezing is the phase change in which a liquid turns into a solid as it loses thermal energy.

Front

What is the difference between exothermic and endothermic processes?

Back

Exothermic processes release energy, while endothermic processes absorb energy from the surroundings.

Front

What is the significance of thermal energy in phase changes?

Back

Thermal energy is crucial in phase changes as it determines the state of matter; adding energy can cause melting or vaporization, while removing energy can lead to freezing or condensation.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid's vapor pressure equals the external pressure, allowing it to change into a gas.