Amplify Critical Juncture Phase Change

Front

What is a phase change?

Back

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

Front

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

Back

The molecules lose energy, move closer together, and begin to move around each other.

Front

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

Back

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

Front

What is the effect of temperature on molecular movement?

Back

As temperature increases, molecular movement increases; as temperature decreases, molecular movement decreases.

Front

What is the term for the energy required to change a substance from solid to liquid?

Back

The term is 'heat of fusion'.

Front

What is the term for the energy required to change a substance from liquid to gas?

Back

The term is 'heat of vaporization'.

Front

How does the attraction between molecules affect phase changes?

Back

Stronger attractions between molecules require more energy to overcome, affecting the phase change process.

Front

What happens to the molecules of water when it evaporates?

Back

The water molecules gain energy, move faster, and break free from the liquid state to become gas.

Front

What is the relationship between pressure and phase changes?

Back

Increasing pressure can raise the boiling point of a liquid, affecting its phase change to gas.

Front

What is an example of a substance that can exist in all three states of matter?

Back

Water can exist as solid (ice), liquid (water), and gas (water vapor).