Multiple choice

Evaporation brings a fall in temperature because

  1. evaporation has a cooling effect

  2. evaporation needs heat

  3. the temperature of the vapours is lower

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is a phase change from liquid to gas, which requires energy in the form of latent heat. This heat is absorbed from the surroundings, causing the temperature of the remaining liquid to drop.

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