A room contains 35 kg of dry air and 0.5 kg of water vapour. The total pressure and temperature of the air in the room are 100 kPa and 25°C respectively. Given that the saturation pressure for water at 25°C is 3.17 kPa, the relative humidity of the air in the room is

A room contains 35 kg of dry air and 0.5 kg of water vapour. The total

1.	A room contains 35 kg of dry air and 0.5 kg of water vapour. The total pressure and temperature of the air in the room are 100 kPa and 25°C respectively. Given that the saturation pressure for water at 25°C is 3.17 kPa, the relative humidity of the air in the room is
A.	67%
B.	55%
C.	83%
D.	71%
Answer» E.

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A room contains 35 kg of dry air and 0.5 kg of water vapour. The total pressure and temperature of the air in the room are 100 kPa and 25°C respectively. Given that the saturation pressure for water at 25°C is 3.17 kPa, the relative humidity of the air in the room is

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