Question

Why does temperature remain the same during melting till all the ice has changed to water ?

Answer 1

1. Latent heat is defined as the heat or energy that is absorbed or released during a phase change of the substance. It could either be from a gas to liquid or liquid to solid and vice-versa.
2. Heat energy is being used in changing the state of matter. When the heat energy supplied to ice it changes into water and then into vapor form. If we cool the steam then it gets converted into water and further cooling of water changes into ice.
3. This heat is used to increase the kinetic energy of particles of ice to such an extent that the matter get converted into another form.
4. So, until all the ice has melted, the heat absorbed doesn't raise the temperature of the ice-water mixture. In the same way, the temperature doesn't change while a liquid is boiling.
5. Hence, because of latent heat the temperature remain constant during melting till all the ice has changed to water.