Heating & Cooling Curves Review

Front

What is an exothermic process?

Back

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

Front

What is an endothermic process?

Back

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

Front

In a heating curve, what does a flat line indicate?

Back

A flat line indicates a phase change where the temperature remains constant while the substance changes from one phase to another.

Front

During which phase change does a substance melt?

Back

A substance melts during the transition from solid to liquid.

Front

During which phase change does a substance freeze?

Back

A substance freezes during the transition from liquid to solid.

Front

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

Back

The temperature remains constant during a phase change.

Front

In which region of a heating curve would you find a substance in both solid and liquid phases?

Back

You would find a substance in both solid and liquid phases in the region where melting occurs.

Front

In which region of a heating curve would you find a substance in both liquid and gas phases?

Back

You would find a substance in both liquid and gas phases in the region where boiling occurs.

Front

What is the significance of the melting point?

Back

The melting point is the temperature at which a solid becomes a liquid.

Front

What is the significance of the boiling point?

Back

The boiling point is the temperature at which a liquid becomes a gas.