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JAMB Physics 2012 Question 23

Question 23

Change of State and Vapours

Which of the following is NOT a factor that can increase the rate of evaporation of water in a lake?

  1. A.Increase in the pressure of the atmosphere.
  2. B.Rise in temperature
  3. C.Increase in the average speed of the molecules of water
  4. D.Increase in the kinetic energy of the molecules of water.
Show the answer and explanation

Answer: A (Increase in the pressure of the atmosphere.)

Explanation

Higher temperature and faster, more energetic molecules all speed up evaporation. A higher atmospheric pressure slows it down.