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Evaporation requires heat energy.

During evaporation, the liquid particles at the surface get heated and start vibrating at a greater amplitude. These particles move into a gaseous phase as the bond between them and the rest of the liquid breaks.

This reduces the average energy possessed by the liquid and thus causes a cooling effect.

Evaporation causes cooling as it utilises surrounding heat for the process-Teachoo-01.jpg

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo