Question

The amount of heat required to change unit mass of liquid into its vapor state without change in its temperature is known as :

• A. Latent heat of vaporisation
• B. Latent heat of fusion
• C. Specific latent heat of vaporisation
• D. Specific latent heat of fusion

Answer 1

The correct option is A Latent heat of vaporisation

Amount of heat required to change unit mass of liquid into vapour state without change in its temperature is known as latent heat of vapourisation.

Latent heat of vapourisation is a physical property of a substance. When a material in liquid state changes its phase from liquid to vapour, the energy absorbed in the process; is known as latent heat of vapourisation. For eg: For water, it is $2260kJ/Kg$ or $40.8kJ/mol$.