JAMB Chemistry 2010 Question 4

Question 4

Kinetic Theory and States of Matter

The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that the

  1. A.water vapour in the air around the bottle gains some energy from the bottle
  2. B.temperature of the milk drops as it loses heat into the surroundings
  3. C.saturated vapour pressure of the milk is equal to the atmospheric pressure
  4. D.water vapour in the air around the bottle loses some of its energy to the bottle
Show the answer and explanation

Answer: D (water vapour in the air around the bottle loses some of its energy to the bottle)

Explanation

The cold bottle takes heat from nearby water vapour, which cools and condenses into droplets.