Question

What do you understand by the ‘latent heat of vaporization’ of a substance?

Answer 1

The latent heat of vaporization of a given liquid is the heat required to convert one kilogram of the liquid into vapour at its boiling point without any change of temperature. It is measured in joule per kilogram. The latent heat of vaporization of water is 2260 × 10³ J/kg. It means that we need 2260 × 10³ J of heat to convert 1 kg of water at its boiling point into steam.