4th Phase Change Diagrams Practice F22

Front

What is the 4th phase change in a phase change diagram?

Back

The 4th phase change typically refers to the transition from a liquid to a gas, known as vaporization.

Front

Define 'melting' in the context of phase changes.

Back

Melting is the process where a solid turns into a liquid when heat is applied.

Front

What does a horizontal line on a phase change diagram indicate?

Back

A horizontal line indicates a phase change where temperature remains constant while the substance changes state.

Front

What is the significance of point A in a phase change diagram?

Back

Point A usually represents a state of matter, often a gas, before any phase change occurs.

Front

Explain what happens to temperature during condensation.

Back

During condensation, the temperature of a substance remains constant while it changes from a gas to a liquid.

Front

What is an endothermic process?

Back

An endothermic process is one that absorbs heat from the surroundings, causing a temperature drop in the environment.

Front

What is an exothermic process?

Back

An exothermic process is one that releases heat to the surroundings, causing a temperature increase in the environment.

Front

Describe the phase change occurring from D to E on a phase change diagram.

Back

From D to E, the substance is freezing, transitioning from a liquid to a solid.

Front

What does the term 'boiling point' refer to?

Back

The boiling point is the temperature at which a liquid turns into a gas.

Front

How does pressure affect phase changes?

Back

Increasing pressure can raise the boiling point of a liquid and can also affect the melting point.