ChemistryIs it true that evaporation is an exothermic process?

Is it true that evaporation is an exothermic process?


  1. A
    True
  2. B
    False  

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    Solution:

    The above statement is false.
    Evaporation is when a liquid changes into vapours even below its boiling point. During evaporation, the latent heat of evaporation is taken from the atmosphere. Endothermic processes are those in which the reactants absorb heat energy from the surroundings to form a product. So, evaporation is an endothermic process as the water molecules absorb heat energy from their surroundings to increase their kinetic energy. For example, sweat cools the human body when it evaporates from the skin.
    The corrected statement would be, “Evaporation is an endothermic process”.
     
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