Question

Which condition out of the following will increase the evaporation of water ?

• A. Increase in temperature of water
• B. Decrease in temperature of water
• C. Less exposed surface area of water
• D. Adding common salt to water

Answer 1

The correct option is A

Increase in temperature of water

The explanation for correct option:
(A) Increase in temperature of water

• As the temperature of the water increases, the kinetic energy increases.
• As a result, the force of attraction between the molecules decreases, and the molecules become more and more separated.
• Thus, increasing the temperature of a body of water also often increases evaporation.
• This is because as the temperature rises, the water molecules begin moving about more rapidly and will finally escape.

The explanation for incorrect options:
(B) Decrease in temperature of water

• If the temperature decreases, the kinetic energy decreases hence evaporation rate will decrease.

(C) Less exposed surface area of water

• If the surface area decreases, the evaporation rate will decrease.

(D) Adding common salt to water

• Adding any solute decreases the evaporation rate.

Therefore, Option A is correct.