why dose evaporation causes cooling
Answers
Answer:
Evaporation causes cooling because the process requires heat energy. The energy is taken away by the molecules when they convert from liquid into gas, and this causes cooling on the original surface.
Explanation:
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Explanation:
Evaporation requires heat to occur. Unlike boiling, it may occur at a temperature below the boiling point. So, when evaporation occurs, the liquid absorbs the heat from the surface it is in contact with. Now, when the heat is absorbed, the surface gets cooler as the temperature of the surface decreases due to lesser heat than before. This heat overcomes the force of attraction between the constituent particles of matter of the liquid and henceforth, the liquid evaporates. Furthermore, this heat is known as Latent heat of vaporisation as it does not show any rise in the temperature and is termed “latent” (hidden).
As an example, when there are condensed water droplets on a surface, they disappear after evaporation. Another example, when our sweat evaporates, we feel cooler as the heat from our body is absorbed.