If a gas mixture (10% CO2 + 90 % Helium) is passed through a distilled water maintained at constant temperature of 323 K, what are partial pressure and vol% of each component (CO2, He, and moisture) at exit? Other data are; Total pressure of system = 1 bar. Initial flow rate of gas mixture (10% CO2 + 90 % Helium) = 30 ml/min.
If you bublble the gas efficiently, you gas mixture will be satured with water at 323 K. This means that water vapour partial pressure in the system will be water vapour pressure at this temperature. Using one of valid Antoine equation or a software calculator, (see http://www.endmemo.com/chem/vaporpressurewater.php) you will find this pressure as 0.1222 bar at 323K. Since vol fraction equals mol fraction, water content will be 12.22% (0.1222/1*100) by volume. The other two gases will be in the proportion of:
CO2: 10% of (1-0.1222)= 8.778% by volume
H2: 90% of (1-0.1222)= 79.002%
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