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An air stream is saturated with a vapor (B) at 130ï‚°F and 1 atm pressure. It...

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Chemistry

An air stream is saturated with a vapor (B) at 130ï‚°F and 1 atmpressure. It is cooled down to 80ï‚°F where some of the B iscondensed and separated from the vapor stream. The remaining vaporstream is then reheated back to 130ï‚°F.


a. What is the mole fraction of B in the air coming out of theprocess?

b. For an inlet flow rate of 2000 ft3/min of air saturatedwith B, what would be the flow rate of the liquid B stream(lb/min)?

c. If the process could cool the stream down to 50ï‚°F insteadof 80ï‚°F, what would be the outlet mole fraction of B in thiscase?



Note:
Vapor pressure of B at 80ï‚°F = 0.5067 psia
Vapor pressure of B at 130ï‚°F = 2.221 psia MW of B = 20

Heat capacity of liquid B = 0.87 (btu)/(lb)(ï‚°F)

Answer & Explanation Solved by verified expert
4.4 Ratings (570 Votes)
1 atm 147 psia At 130 degF air stream is saturated Partial pressure vapor pressure 2221 Psia Moles of water vapor moles of dry air partial pressure of water vapor partial pressure of dry air 22211472221 01779 Moles of water vapor 01779 moles of dry air Flow rate 2000ft3min Temperature 130 degF 130460590R P 147 Psia R 10731 psift3 Total number of moles n    See Answer
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