Phase Changes of Matter

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is heat?

Back

The transfer of thermal energy from a warmer object to a cooler one.

Front

What is thermal energy?

Back

The total kinetic energy of particles in a substance.

Front

What is temperature?

Back

A measure of the average kinetic energy of particles in a substance.

Front

What happens during evaporation?

Back

A liquid changes into a gas.

Front

What is condensation?

Back

The process where a gas changes into a liquid.

Front

What is melting?

Back

The process where a solid changes into a liquid.

Front

What is freezing?

Back

The process where a liquid changes into a solid.

Front

What is the boiling point of water?

Back

100 degrees Celsius at standard atmospheric pressure.