A vapor mixture, 4.652 mol/s, of n-butane and n-hexane containing 50 mole % n-butane at 120˚C and 1 atm is cooled to 57˚C. At this temperature some of the vapor is condensed. Liquid and vapor streams emerge from this single unit process at a pressure of 1.447 atm. The vapor product contains 60 mole % butane.  a. What is the composition of the liquid stream?  b. What is the flow rate of the vapor stream?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A vapor mixture, 4.652 mol/s, of n-butane and n-hexane containing 50 mole % n-butane at 120˚C and 1 atm is cooled to 57˚C. At this temperature some of the vapor is condensed. Liquid and vapor streams emerge from this single unit process at a pressure of 1.447 atm. The vapor product contains 60 mole % butane. 

a. What is the composition of the liquid stream? 

b. What is the flow rate of the vapor stream? 

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