Example 6-8 Saturated Water Vapor-Air Mixture

An air-water vapor mixture is saturated with water vapor at 80°F and 2 in. Hg abs total pressure. The air in the mixture is 60 lbs/hr. Determine the volume at these conditions. 

A system handles 50 lbs/hr of air that is saturated with water vapor at 3 inch Hg abs and 95°F. Find the total amount of water vapor. 

From steam tables, specific volume of water vapor at 80°F and 1.034 in. Hg abs = 633.8 cu ft/lb 

As an alternate method, total mols could be calculated (6- 4) and converted to volume at 80°F and 2 mm Hg abs. 

Applied Process Design for Chemical and Petrochemical Plants 

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