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Q.

Is it true that evaporation is endothermic?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
In the evaporation process, liquid changes to vapors even below its boiling point. Exothermic reactions are those in which heat is released at the end of the reaction, whereas endothermic reactions require some form of energy as heat to complete the reaction. Evaporation is an endothermic reaction because molecules of water must absorb heat from their surroundings to increase their kinetic energy and change them to vapors. For example, sweat, which cools the human body, evaporates from the skin.
 
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