The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air.
| RH | = | mass of water vapour in volume of air
mass of water vapour for saturation |
| RH | = | m
M |
= | 0.05
0.15 |
× | 100 | = | 5
0.15 |
= | 500
15 |
= | 33.33% |
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