Question

Why do the temperature of the water does not rise further 100 once it starts boiling. Define the term

Answer 1

This is because all the heat is used in the change in state of water from liquid to gas..

Answer 2

molecules in a liquid do not have the same kinetic energy. ... When a liquid reaches its boiling point bubbles of gas form in it which rise into the surface and burst into the air. 

When boilingoccurs, the more energetic molecules change to a gas, spread out, and form bubbles. ... In addition, gas molecules leaving the liquid take away heat energy. Therefore the temperatureof the liquid remains constant during boiling.