WHY BOILING IS CONSIDERED A BULK PHENOMENON?

Asked by Asmita | 16th Aug, 2015, 09:11: PM

Expert Answer:

The temperature at which liquid changes into its gaseous state is called as boiling point.
During boiling of a liquid, say water or milk, heating is to be done from the bottom of the vessel to bring the temperature of the entire liquid to its boiling point - so it is a bulk phenomenon.
 
But in case of evaporation, the liquid evaporates from the top surface without heating, for example, evaporation of water from the surface of a lake or vesssel. Thus, evaporation is a surface phenomena.

Answered by Prachi Sawant | 17th Aug, 2015, 09:52: AM