Question

Explain the terms vaporization and boiling point.

Answer 1

VAPORIZATION: Change of liquid to vapours (gas) on heating at a constant temperature is called vaporization.
When we heat a liquid temperature starts rising till it starts changing into vapours and then temperature remains constant for sometime, though we are supplying heat. This heat supplied is being used to change every molecule of liquid into vapours and temperature does not rise till the whole of liquid is changed into vapours.

BOILING POINT: The temperature at which a liquid starts changing into vapours or gas at constant temperature is called its boiling point.