Enumerate the change that takes place a liquid during evaporation.

(b) How is rate evaporation affected by change in the following? Justify your answer.

(i) Temperature

(ii) Wind speed

(iii) Humidity

Ans. (a) During evaporation, a small fraction of particles at the surface having higher KE is able to break away from the force of attraction of other particles and gets converted into vapour.

(b) (i) Increases with temperature due to increase in KE of the particles.

(ii) Increases with wind speed as the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding.

(iii) Decreases with humidity as the amount of water vapour in air is already high.

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