Procedure :
(i) Take small ice cubes in a beaker. Insert the thermometer into ice cubes in the beaker.
(ii) Observe the reading of the thermometer.
(iii) Now start heating the beaker keeping it on a burner.
(iv) We will observe that the temperature of the ice at the beginning is equal to or below 0°C.
(v) If the temperature of ice is below 0°C, it goes on changing till it reaches 0°C. When ice starts melting, you will notice no change in temperature though there is supplying of heat continuously.
(vi) The heat energy supplied to ice is to change the phase of ice from solid to liquid without raising the temperature, this process is called melting.
(vii) The heat energy required to convert 1 gm of solid completely into liquid at a constant temperature is called latent heat of fusion.
