what is mean by specific latent heat of fusion ?
Answers
specific latent heat of fusion :-
the amount of heat energy absorbed at contant temperature by unit mass of a solid to convert into liquid phase is called the specific latent heat of fusion
Explanation:
Changing the internal energy of a material will cause it to change temperature or change state. The thermal energy to:
change the temperature is given by the specific heat capacity
change the physical state is given by the specific latent heat
The specific latent heat of a substance is the amount of energy needed to change the state of 1 kg of the substance without changing its temperature.
Each substance has two specific latent heats:
latent heat of fusion (the amount of energy needed to freeze or melt the substance at its melting point)
latent heat of vaporisation (the amount of energy needed to evaporate or condense the substance at its boiling point)
It usually takes more energy to boil a substance than to melt it, so the latent heat of vaporisation for a substance is usually greater than its latent heat of fusion. The table shows some typical values: