definition of latent heat of fusion and evaporation
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Answer:
The enthalpy of fusion of a substance, also known as (latent) heat of fusion is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure. For example, when melting 1 kg of ice (at 0 °C under a wide range of pressures), 333.55 kJ of energy is absorbed with no temperature change. The heat of solidification (when a substance changes from liquid to solid) is equal and opposite.
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.
Latent heat of fusion.
=>. The amount of heat energy required to convert 1 kg of solid into liquid without any change in temperature.
Latent heat of evaporation.
=>. The amount of heat required to convert 1kg of liquid into gas without change in temperature.