Category: physics

Nutshell: Cooling and Heating Graphs

Cooling Graph: A temperature graph showing an increase in temperature over a period of time.
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– example of a cooling graph –

Heating Graph: A temperature graph showing a decrease in temperature over a period of time.
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– example of a heating graph –

The segments which show constant temperature means that a change in state is taking place.

The possible state changes in a cooling graph are condensation and freezing.

The possible state changes in a heatin graph are melting and boiling.

No Temperature Change = State Change
You can identify the portions which is undergoing state change by looking at which portion is experiencing no temperature change.

Boiling Point
is the temperature at which a liquid changes into its gaseous state.

Melting point is the temperature at which a solid changes into its liquid state.