Question

What is meant by latent heat of vapourisation ?

Answer 1

The amount of heat energy required to change 1 kg of liquid to gas at atmospheric pressure at its boiling point

Answer 2

Latent heat of vaporization is a physical property of a substance. It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. It is expressed as kg/mol or kJ/kg. ... The heat of vaporization of water is about 2,260 kJ/kg, which is equal to 40.8 kJ/mol.

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