At boiling point and melting point, there is no change in temperature. There is only phase change from solid to liquid during melting and liquid to gas during boiling. So at this time specific heat of water becomes infinite.

Yes, there are certain conditions under which the temperature of a body can remain constant regardless of the amount of heat supplied to it. These conditions occur when the body is in thermodynamic equilibrium with its surroundings.

In thermodynamic equilibrium, the body is in a state where it is no longer exchanging heat or matter with its surroundings. This means that the body is at a constant temperature and is not undergoing any changes in its internal energy.

If a body is in thermodynamic...

The specific latent heat of vaporization of a liquid is the amount of heat energy that is required to vaporize (or turn into a gas) a certain mass of the liquid at a constant temperature. The specific latent heat of vaporization is usually expressed in units of energy per unit mass (e.g. joules per gram).

Example: Latent heat of vaporization of water is 540 cal/gm which means that 540 calorie of heat energy is required to change the water having mass 1 kg into vapour at constant temperature.