Question

The heat gained or lost during a change of state from solid to liquid or from liquid to solid is called the latent heat of .......

• A. fusion
• B. freezing
• C. vaporisation
• D. condensation

Answer 1

Answer: (A)

fusion

The heat associated with the melting of a solid or freezing of a liquid is called the latent heat of fusion. This heat remains hidden as no rise in temperature is observed on its absorption until the phase change is completed, so it is called latent, which means hidden.

Latent heat of vaporisation is the heat associated with vaporisation of a liquid or condensation of vapour.

Freezing and condensation are processes by which liquid changes to ice and gas changes to liquid respectively. Hence option A is correct.