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Questions and Answers
The molecular weight of water is approximately 18.0.
The molecular weight of water is approximately 18.0.
True (A)
The gas constant for water vapour is 461.53 m3 Pa / kg mol K.
The gas constant for water vapour is 461.53 m3 Pa / kg mol K.
False (B)
Below temperatures of 66°C, the saturated or superheated vapour follows non-ideal gas laws.
Below temperatures of 66°C, the saturated or superheated vapour follows non-ideal gas laws.
False (B)
The specific heat of water vapour is approximately 2.0 kJ/(kg K) at a temperature range of -71 to 124°C.
The specific heat of water vapour is approximately 2.0 kJ/(kg K) at a temperature range of -71 to 124°C.
The enthalpy of water vapour is given by the equation H_w = 2501.4 + 1.88 T_a.
The enthalpy of water vapour is given by the equation H_w = 2501.4 + 1.88 T_a.
Air-vapour mixtures exactly follow the perfect gas laws.
Air-vapour mixtures exactly follow the perfect gas laws.
The Gibbs-Dalton law is not applicable to atmospheric air-steam mixtures.
The Gibbs-Dalton law is not applicable to atmospheric air-steam mixtures.
The total pressure exerted by an air-vapour mixture is equal to the sum of the partial pressures of the constituent gases.
The total pressure exerted by an air-vapour mixture is equal to the sum of the partial pressures of the constituent gases.
The atmospheric air exists at a total pressure equal to the atmospheric pressure.
The atmospheric air exists at a total pressure equal to the atmospheric pressure.
Water molecules present in an air-vapour mixture do not exert pressure on the surroundings.
Water molecules present in an air-vapour mixture do not exert pressure on the surroundings.
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