The Heating Curve




Figure below shows the change of the temperature when a solid is heated until it become gas.

Note:
B to C

  1. Temperature remain unchanged because the heat absorbed is used to overcome the force between the particles in the solid.
  2. The heat absorbed to change a solid to liquid is called the latent heat of fusion.

D to E

  1. Temperature remain unchanged because the heat absorbed is used to overcome the force between the particles in the liquid and also the atmospheric pressure.
  2. The heat absorbed to change a liquid to gas is called the latent heat of vaporisation.