Question

describe what happens to the temperature of liquid water between 0 and 100 degrees celcius when heat energy is transferred to it at a constant rate

Answer 1

The temparature of the water increases as it is heated at a constant rate i.e, the energy is transferred at a constant rate. The temperature initially increases for a given time. After that, the temperature does not increase (remains constant for some time) . The water is changing the state (from liquid to ice or liquid to vapour etc). the energy transferred to the water does not increase the translational energy of water molecules . after the change in the state is over, the temperature again increaes.