100. kg of atmospheric air (whose composition is given in Example) is cooled in a 0.500 m3constant volume container to 200. K. Determine the mixture pressure using Dalton's compressibility factor.
Compare this result with that obtained by assuming ideal gas (i.e., Zm = 1.00) behavior.
Example :
The molar composition of air that is normally used to determine the thermodynamic properties of air at standard temperature and pressure is
|
Component
|
Molar %
|
|
Nitrogen
|
78.09
|
|
Oxygen
|
20.95
|
|
Argon
|
0.930
|
|
CO2 and trace gases
|
0.0300
|
|
Total
|
100.00%
|
Determine (a) the equivalent molecular mass, (b) the gas constant for this mixture, and (c) the composition of air on a mass (or weight) basis.