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What is latent heat of vaporisation? Discuss in details. |
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Answer» • The amount of heat in Joules which is required to convert unit mass or 1 kg liquid in vapours form without rise in temperature is known as latent heat of vaporization. • It has been found by experiments that 22.5 x105 joules of heat is required to change 1 kilogram of water (at its boiling point, 100°C) to steam at the same temperature of 100°C. so, the latent heat of vaporization of water is 22.5 x105 joules per kilogram (or 22.5 x105 J/kg). • “If the liquid freezes to form a solid and steam condenses to form water, an equal amount of latent heat of fusion and vaporization respectively will be given out by the substance.” • Different substances have different Latent Heat of vaporization. |
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