LATENT HEAT

The amount of heat which is used in converting state from one to another at its melting point or boiling point is called latent heat of that substance.

FOR EXAMPLE:- 

1.When we provide heat to the ice at its melting point its temperature can't get rise. Then where is the heat gone ?

The heat is used in breaking the particles of ice or we can say that it is used in converting solid into liquid.

The amount of heat which is used in converting solid(ice) into liquid (water)is called latent heat of fusion/melting 

2.When we provide the heat to the water at its boiling point , its temperature can't rise. Then where the heat gone which is provided at its boiling point? 

The heat is used in converting water into water vapour or we can say that heat is used in breaking the bond of water particles.

 The amount of heat which is used in converting liquid(water) into gas(water vapour)is called latent heat of fusion/melting 

• The different substances have different latent heat.
• Latent heat is the property of substances.

Latent heat is of two types:-

1. Latent heat of fusion
2. Latent heat of vaporization

Latent heat of fusion

The amount of heat required to change the state of unit mass of any substance from solid to liquid at its melting point is called latent heat of fusion.

Latent heat of vaporization

The amount of heat required to change the state of unit volume of any matter from liquid to gas at its boiling point is called its latent heat of fusion.