Moist air is filled inside a room with total pressure of 100 kPa, and at 25∘C. If the moist air is saturated with mass of dry air as 50 kg, the mass of vapour in the room is (use saturation pressure of water at 25∘C as 3.17 kPa)
A
10.18 kg
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B
1.018 kg
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C
9.98 kg
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D
0.998 kg
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Solution
The correct option is B 1.018 kg ω=0.622×PvPt−Pv=0.622×3.17100−3.17