Phase Change Amplify - End of Unit Study Guide

Front

What happens to the molecules of a substance when it changes from a gas to a liquid?

Back

The molecules move slower and they move around each other.

Front

What is the effect of adding energy to a liquid substance?

Back

It can cause the substance to change phase, typically to a gas if the energy is sufficient.

Front

What is the difference between a substance that changes phase and one that does not when energy is added?

Back

The substance that changes phase has molecules that can move fast enough to overcome the attraction between them.

Front

How does the attraction between molecules affect their movement in different phases?

Back

In solids, molecules are closely packed and vibrate in place; in liquids, they move around each other; in gases, they move freely and are far apart.

Front

What is the relationship between temperature and molecular movement?

Back

As temperature increases, molecular movement increases, leading to phase changes.

Front

What does it mean for a substance to have a 'weaker attraction' between its molecules?

Back

It means that the molecules can move more freely, making it easier for the substance to change phase.

Front

What is a phase change?

Back

A phase change is a transition of a substance from one state of matter to another, such as solid to liquid or liquid to gas.

Front

What happens to the molecules of a substance when energy is removed from it?

Back

The molecules move slower and may come closer together, potentially leading to a phase change.

Front

What is the significance of molecular movement in understanding phase changes?

Back

Molecular movement determines how substances respond to energy changes, affecting their phase.

Front

What is the state of molecular movement in a solid?

Back

Molecules in a solid are closely packed and vibrate in place.