Question

Q. Which of the following phenomena always results in the cooling effect?

(a) Condensation

(b) Evaporation

(c) Sublimation

(d) None of these

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Answer 1

a) Evaporation is the phenomenon which always results in the cooling effect.

What is evaporation?

• Evaporation can be described as a process by which a liquid compound changes into a gaseous compound.
• For the process of evaporation to occur, heat is absorbed from the atmosphere and hence in this way evaporation causes cooling.
• For the process of changing a liquid to a gas, heat is absorbed from the atmosphere. As a result, the outside environment becomes cooler.

Answer 2

Answer:

b) Evaporation

Explanation:

Evaporation always resulta in cooling. Hence evaporation is the phenomenon which always results in cooling.