Vaporization in Physics:
The gaseous state of a liquid is called the vapour of that liquid. This process by which a liquid changes into vapour is called vaporisation. The opposite process is called condensation. The condensation of vapour into liquid is called condensation or liquefaction.
Just as a solid substance absorbs latent heat when it converts into a liquid, a liquid also absorbs latent heat when it converts into vapour. The amount of heat absorbed by the unit mass of a liquid to convert into vapour is called Latent heat of vaporisation. This value depends on the temperature at which the vaporisation occurs. The vaporisation of liquids may take place in two ways:
1. Evaporation: The gradual change of a liquid to its vapour state at any temperature from the surface of the liquid is called evaporation.
2. Boiling: The rapid change of a liquid to its vapour state at a certain temperature from the whole volume of the liquid is called boiling. This particular temperature depends on the pressure on the liquid and remains constant until the whole liquid transforms into vapour.