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Question 24
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
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Solution
On hot summer days, our body prespires more.This mechanism helps our body to cool down.During evaporation, particles that reside at the surface gain energy from the surroundings and change into vapour. The heat energy equal to the latent heat of vaporisation is absorbed from the body leaving the body cool. Cotton clothes absorbs sweat easily, and exposes it to the atmosphere for easy evaporation. While nylon clothes does not.
Hence, Priyanshi who wearing cotton cloth will feel more comfortable, while Ali does not.
On hot summer days, our body prespires more.This mechanism helps our body to cool down.During evaporation, particles that reside at the surface gain energy from the surroundings and change into vapour. The heat energy equal to the latent heat of vaporisation is absorbed from the body leaving the body cool. Cotton clothes absorbs sweat easily, and exposes it to the atmosphere for easy evaporation. While nylon clothes does not.
Hence, Priyanshi who wearing cotton cloth will feel more comfortable, while Ali does not.
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