1.

Define latent heat of evaporation .explain why there is no temperature change when ice is melting

Answer»

Latent heat of vaporisation it is the energy (heat) required to TRANSFORM a liquid mass at the BOILING point (for example, water at 100°C at normal pressure) from liquid to gas.

It is called "latent" (not seen, not registered) since this energy flow do not CHANGE the TEMPERATURE so we can not "see" it.

For water, is about 2264 kJ/kg or 2264 J/g or 541 cal/g.

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