Assertion : Perspiration from the human body | vedclass

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(C) Perspiration involves the exchange of heat from the body to the surroundings. Water absorbs latent heat from the body to undergo phase change from

Vedclass · Accepted Answer

If the Assertion is correct but Reason is incorrect.

Vedclass · Answer

(C) Perspiration involves the exchange of heat from the body to the surroundings. Water absorbs latent heat from the body to undergo phase change from liquid to vapour. This process removes thermal energy from the skin,causing the body to cool down. Emissivity is a property of the surface material. $A$ thin layer of water on the skin does not enhance its emissivity; in fact,it does not significantly change the emissivity of the skin in the context of cooling. Therefore,the Assertion is correct,but the Reason is incorrect.

$Assertion :$ Perspiration from the human body helps in cooling the body.
$Reason :$ $A$ thin layer of water on the skin enhances its emissivity.

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$Assertion :$ Perspiration from the human body helps in cooling the body.$Reason :$ $A$ thin layer of water on the skin enhances its emissivity.