The feed to a distillation column contains 36% benzene by weight, the remaining being toluene. The overhead distillate is to contain 52% benzene by weight while the bottom is to contain 5% benzene by wight. Carry out a DoF analysis and calculate the percentage of the benzene feed in the distillate and the percentage of the total feed leaving as the distillate.

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
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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The feed to a distillation column contains 36% benzene by weight, the remaining being toluene. The
overhead distillate is to contain 52% benzene by weight while the bottom is to contain 5% benzene by
wight. Carry out a DoF analysis and calculate the percentage of the benzene feed in the distillate and
the percentage of the total feed leaving as the distillate. 

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