Amplify Phase Change Assessment Review

Front

What happens to water molecules when energy is transferred out and the water freezes?

Back

The molecules move slower and closer together.

Front

What describes the movement of molecules in an ice cube as it melts into water?

Back

The molecules began moving around each other.

Front

Which substance has the strongest molecular attraction based on freezing points: Water (0°C), Ethanol (-114°C), or Benzene (5.5°C)?

Back

Benzene, because its higher freezing point suggests stronger molecular attractions.

Front

Which liquid requires more energy to change from liquid to gas: a liquid with strong molecular attractions or a liquid with weak molecular attractions?

Back

A liquid with strong molecular attractions.

Front

What property of ice does not change during the phase change from ice to water?

Back

The molecular attraction between its molecules.

Front

Define phase change.

Back

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

Front

What is kinetic energy?

Back

The energy of motion that molecules possess, which increases with temperature.

Front

Explain the concept of molecular attraction.

Back

The force that holds molecules together, which varies in strength depending on the substance.

Front

What is the freezing point of a substance?

Back

The temperature at which a substance changes from a liquid to a solid.

Front

How does temperature affect molecular movement?

Back

As temperature increases, molecular movement becomes faster; as temperature decreases, it slows down.