(1) Take a few pieces of ice in a glass beaker as shown in figure.

(2) Insert the bulb of a thermometer in ice and measure its temperature.
(3) Put the beaker on a stand and heat the ice using a burner.
(4) Record the temperature using the thermometer after every minute.
(5) As the ice is heated,it starts melting. Stir the mixture of ice and water.
(6) Continue the heating even after ice starts melting.
(7) Draw a graph of temperature versus time.

The specific latent heat of vaporization of water is `540 cal //g`. Explain this statement.

Explanation

When 1 g of water at a pressure of one atmosphere and at a temperature of `100^(@)C ` is converted into 1 g of steam, heat absorbed by the water is 540 cal.