Question

What happens to the energy level of molecules in water on boiling?

Answer 1

1. The process in which a liquid substance changes into a gas rapidly on heating is called boiling.
2. So, when water changes into steam rapidly on heating, it is called boiling of water.
3. When the water is heated, the heat energy makes its particles move even faster.
4. At the boiling point, the particles of the water have sufficient kinetic energy to overcome the forces of attraction holding them together and separate into individual particles.
5. Thus, the water boils to form steam.

Thus, the kinetic energy of the molecules in water increases on boiling.