Question

Consider the following statements:
(1) Evaporation is a surface phenomenon.
(2) The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed.
(3) Evaporation causes cooling.
Which of the statements given above is/are correct about evaporation?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2 and 3

Answer 1

The correct option is D 1, 2 and 3

Evaporation of water can be represented as:

$H_{2}O\left(l\right)\rightleftharpoons H_{2}O\left(g\right)$ and is an endothermic process.

Since the equilibrium can exist when the two phase are in contact, therefore its a surface phenomenon. Statement 1 is true.

The equilibrium can be disturbed by changing parameters like temperature, pressure etc. So 2 is true

As it is an endothermic process, it absorbs heat from the surroundings and therefore results in cooling. 3 is true.

Hence all statements are correct and option D is the answer.