Question

What is latent heat of vaporisation?

Answer 1

latent heat of vaporization is actually the amount of heat required to change the phase of liquid or gas
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Answer 2

Hi Friend,

Like in melting the temperature does not change during boiling hence we provide heat continuously.The temperature remains same till whole ice is not melt. This is because the heat that we provide is used in breaking the forces of attraction between the particle of matter and also to increase kinetic energy of molecules of that substance.Same is with liquid,the temperature does not change till the whole liquid is changed to gaseous form.

The energy (heat) absorbed in changing a liquid substance into vapour at its boiling point without a change in temperature is called latent heat of vaporisation.

SI unit of latent heat of vaporisation is Joule per kilogram, J/kg.

Latent heat of vaporisation of water is the amount of heat required to convert one unit of mass of water to vapour at boiling point or water ie. at 100°C (373K) and 1atm pressure.

Hope it helps!!!!!