ChemCom Phase Change and Heating Curves 2023

Front

What is the attraction between molecules in a solid?

Back

High

Front

At which point on a heating curve do all three phases coexist?

Back

A

Front

What is an example of water freezing to ice?

Back

Physical change

Front

What phase change occurs at point B as heat is added?

Back

Melting

Front

What does the horizontal flat portion of a heating/cooling curve indicate?

Back

Phase change

Front

What is the process called when a solid turns directly into a gas?

Back

Sublimation

Front

What is the temperature at which a substance starts to boil called?

Back

Boiling point

Front

What is the temperature at which a substance starts to freeze called?

Back

Freezing point

Front

What happens to the temperature of a substance during a phase change?

Back

It remains constant.

Front

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

Back

Heat of fusion