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The mass of water vapour in a given volume of air is 0.05g at 20°C, while the mass...


Question

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.

Options

A) 3.33%

B) 5.55%

C) 33.33%

D) 55.55%

The correct answer is C.

Explanation:

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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