Latent heat of vapourisation is a physical property of a substance. When a material in liquid state is given energy, it changes its phase from liquid to vapour without change in temperature, the energy absorbed in the process is called latent heat of vaporization. The latent heat of vaporization of water is about \\\\(2260kJ/Kg\\\\) which is equal to \\\\(40.8kJ/mol\\\\).