Question

The sprinkling of water reduces slightly the temperature of a closed room because:

• A. Temperature of water is less than that of the room
• B. specific heat of water is low
• C. water has large latent heat of vaporisation
• D. water is a bad conductor of heat

Answer 1

The correct option is C water has large latent heat of vaporisation

When water is sprinkled over a large area, the evaporation of the water takes place. When the water evaporates, it absorbs the heat from the surroundings because the latent heat of vaporization is large for water. Due to this absorption of energy, cooling takes place in the surroundings.

As here question does not specify anything related to the temperature of water hence A can not be the correct choice.

Specific heat of water is high which is about 1 cal or 4.184J per gram hence B is also not correct.

Water is a bad conductor of heat is also correct but that does not justify the answer.

Option $C$ is correct.