A vessel of volume 1000 m3 contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately ?

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Accepted Answer

17. The partial pressure of water vapor is 2.34 kPa. Using the ideal gas law (Pv=PM*P/RT) and given values, the mass of water vapor is calculated to be approximately 17 kg.