Multiple choice

Which of the following statements is a condition for evaporation?

  1. Heat energy absorbed is equal to the latent heat of vaporisation.

  2. Heat energy absorbed is less than the latent heat of vaporisation.

  3. Heat energy absorbed is more than the latent heat of vaporisation.

  4. Heat energy absorbed is independent of the latent heat of vaporisation.
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A Correct answer
Explanation

During evaporation, the particles at the surface of a liquid gain energy from the surroundings or body surface and change into vapours. The heat energy equal to the latent heat of vaporisation is absorbed from the body, giving a cooling effect. 

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