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Question

Air is filled in a cylinder that has a height of 30cm and a radius of 4cm. The air that is inside the cylinder contains 500 gm of water vapour.

What is the absolute humidity inside the cylinder?

A
331.7x103g/m3
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B
221.7x103g/m3
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C
331.7x103g/m3
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D
200x103g/m3
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Solution

The correct option is A 331.7x103g/m3
Absoulute humidity is the actual amount of the water vapour in grams present in one cubic meter volume of air. It is expressed in in unit grams per meter cube (g/ m3).

So, the volume of air present in the cylinder = πr2h= (3.14*4*4*30) =1507.3cm3 i.e.,1.507x103m3

Amount of water vapour = 500g

Hence, the absoulute humdity is (500g)/(1.507x103m3)=337.1x103g/m3

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