A beaker of water is placed in a room with a high humidity level. Which of the following will happen

JAMB Physics 2023 346 views
Source: JAMB · 2023

A beaker of water is placed in a room with a high humidity level. Which of the following will happen to the rate of evaporation of the water?

  1. The rate of evaporation will increase
  2. The rate of evaporation will decrease ✓
  3. The rate of evaporation will stay the same
  4. It is impossible to say without knowing the temperature of the water
Explanation

When the air is already full of water vapour, fewer water molecules can escape from the surface than return to it.

So the net rate of evaporation decreases. Clothes dry slowly on humid days for the same reason.

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