Question

Name two ways of change of liquid state to the vapour state and distinguish them.

Answer 1

Two ways of change of liquid state to vapour state are:

1. Evaporation
2. Boiling.

DIFFERENCE BETWEEN EVAPORATION AND BOILING:

BOILING	EVAPORATION
(1) Heat is supplied.	Heat is absorbed.
(2) Fast process.	Slow process.
(3) Starts from the bottom.	Starts form surface i.e.
(4) Sound is produced.	surface phenomenon Silent process.
(5) Heating effect	Cooling effect
(6) Takes place at a fixed temperature called the boiling point.	Takes place at all temperatures.