Question

when a liquid boil, its temperature remain the same , so where does the heat go

Answer 1

the heat overcomes the force of attraction between the particles of the liquid and change the state from liquid to gaseous. the extra energy applied is known as the latent heat of vapourisation.

Answer 2

Answer

In addition, gas molecules leaving the liquid take away heat energy. Therefore the temperature of the liquid remains constant during boiling

For instance, when water is boiling, adding heat does not increase its temperature. This happens at the boiling temperature of every substance that can vaporize. At the boiling temperature, adding heat energy converts the liquid into a gas WITHOUT RAISING THE TEMPERATURE