Relative humidity is the ratio of the______________________?
Correct answer: B. Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
- A. Partial pressure of the vapour to the vapour pressure of the liquid at room temperature
- B. Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
- C. Actual humidity to saturation humidity
- D. None of these
Explanation
Relative humidity is the ratio of the actual vapour partial pressure to the saturation vapour pressure at the same gas temperature. Using room temperature instead would be incorrect when the gas temperature differs from room temperature.
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