Test Index

JAMB Physics 2023 Paper

Question : 5

Total: 65

On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?

Solution:

Concept:

Relative humidity compares the actual water vapour pressure with the saturated vapour pressure at the same temperature.

Explanation:

40^\circ C

, the saturated vapour pressure of water is

55.3

mmHg.

The partial pressure of water vapour in the air is

38.8

mmHg.

Relative humidity is given by:

\text{Relative humidity} = \frac{\text{partial pressure of water vapour}}{\text{saturated vapour pressure}} \times 100\%

Substitute the given values:

\text{Relative humidity} = \frac{38.8}{55.3} \times 100\%

\text{Relative humidity} \approx 70\%

Answer:

A. 70

Go to Question:

Prev Question

Next Question