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Q.

Latent heat of evaporation of two liquids A and B is 100 J/Kg and 170 J/Kg respectively. Which one can produce more cooling?

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a

A

b

B

c

Cooling is same in both A and B

d

None of the above

answer is B.

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Detailed Solution

B will produce more cooling.
Latent heat of evaporation is the amount of heat required to convert liquid state to gaseous state at a constant temperature. B will cause cooling because it takes more heat from the surroundings and causes more heat of evaporation. B has more latent heat of evaporation than A. So B will be able to produce greater cooling than A. As the rate of evaporation is high so the rate of cooling will also be high.

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