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Fig. 1-7 Does melting ice absorb energy? |
Does melting ice absorb energy? Clearly the ice-water mixture at 0  is much colder than its surroundings. So there must be heat transferred from the surroundings to the ice during melting. But this energy does not cause any increase in temperature, it only causes ice at 0 to turn into water at 0 . The energy causes a change of state only and is called latent heat. Latent heat is measured in joule (  ).
Latent heat is the energy absorbed or released by a substance during a change of state without a change in temperature.
There are two common kinds of latent heat:
The latent heat of fusion is the energy absorbed by a substance when it changes from solid to liquid without a change in temperature.
The latent heat of vaporization is the energy absorbed by a substance when it changes from liquid to gas without a change in temperature.
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