Heating and Cooling Curves

Front

What are heating and cooling curves?

Back

Heating and cooling curves are graphical representations that show the change in temperature of a substance as it absorbs or releases heat over time, illustrating phase changes.

Front

In which regions of a heating and cooling curve is the substance only in one phase?

Back

Regions 1, 3, and 5.

Front

In which regions of a heating and cooling curve does temperature remain constant?

Back

Regions 2 and 4.

Front

What is the direction of thermal energy transfer?

Back

Thermal energy always moves from a high temperature object to a lower temperature object.

Front

In which regions of a heating and cooling curve does a phase change occur?

Back

Regions 2 and 4.

Front

What is the state of the substance between letters C and D on a heating and cooling curve?

Back

Liquid.

Front

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

Back

The temperature remains constant during a phase change.

Front

What is the significance of the flat regions on a heating and cooling curve?

Back

The flat regions indicate phase changes where temperature does not change despite heat being added or removed.

Front

What is the difference between melting and boiling?

Back

Melting is the phase change from solid to liquid, while boiling is the phase change from liquid to gas.

Front

What is latent heat?

Back

Latent heat is the amount of heat required to change the phase of a substance without changing its temperature.