Humans perspire and the moisture evaporates to provide a cooling effect on the s

Question

Humans perspire and the moisture evaporates to provide a cooling effect on the skin. This evaporation of perspiration process is

A)exothermic,  H for the processes is negative

endothermic,  H for the processes is negative

C)exothermic,  H for the processes is positive

endothermic,  H for the processes is positive

A)exothermic,  H for the processes is negative

endothermic,  H for the processes is negative

C)exothermic,  H for the processes is positive

endothermic,  H for the processes is positive

Explanation / Answer

when liquid evaporates, it takes away heat from the surface. Thats the reason sking appear cooler.

So, evaporation is taking heat.

It is endothermic reaction

For endothermic reaction, delta H is positive

Answer: D

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