Heating and Cooling Curves

Front

What does a heating curve represent?

Back

A heating curve shows how the temperature of a substance changes as heat is added, indicating phase changes and temperature increases.

Front

What does a cooling curve represent?

Back

A cooling curve illustrates how the temperature of a substance decreases as heat is removed, showing phase changes and temperature decreases.

Front

What is the definition of kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What happens to kinetic energy during a phase change?

Back

During a phase change, the kinetic energy remains constant while the potential energy changes.

Front

What is the freezing point of water?

Back

0°C (32°F) is the freezing point of water.

Front

What is the boiling point of water?

Back

100°C (212°F) is the boiling point of water at standard atmospheric pressure.

Front

What is an exothermic process?

Back

An exothermic process is a reaction or change that releases heat to the surroundings.

Front

What is an endothermic process?

Back

An endothermic process is a reaction or change that absorbs heat from the surroundings.

Front

In which segment of a heating curve does the substance exist as a liquid?

Back

The segment B-C represents the liquid state.

Front

In which segment of a cooling curve does the substance exist as a solid?

Back

The segment D-E represents the solid state.