Question

Which phenomenon occurs during the following change ?

Water heated up to ${100}^{o}C$.

Answer 1

Vaporization (change of liquid into gas): The process of change of water into vapor is called vaporization. When water is heated after reaching at ${100}^{0}C$ water starts boiling. At this temperature water turns into vapor.
Since, water boils at ${100}^{0}C$, hence ${100}^{0}C$ is called the boiling point of water.