A mixture of 40% ethanol in water is distilled at 1 atm by differential distillation until 75% of the material  charged to the still has vaporized. What is the composition of the liquid residue in the still-pot and the  collected distillate?  Ethanol - Water at 1bar

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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Batch Distillation –Ethanol & Water. 


A mixture of 40% ethanol in water is distilled at 1 atm by differential distillation until 75% of the material 
charged to the still has vaporized. What is the composition of the liquid residue in the still-pot and the 
collected distillate? 

Ethanol - Water at 1bar
Temperature Ethanol
T (F) T (C)  x y
212.1 100.1 0.000 0.000
207.0 97.2 0.010 0.137
203.2 95.1 0.020 0.206
199.9 93.3 0.030 0.258
197.0 91.7 0.040 0.300
192.5 89.2 0.060 0.361
189.2 87.4 0.080 0.404
186.8 86.0 0.100 0.435
182.9 83.8 0.150 0.489
180.5 82.5 0.200 0.525
178.8 81.6 0.250 0.554
177.5 80.8 0.300 0.579
176.5 80.3 0.350 0.602
175.7 79.8 0.400 0.624
175.0 79.4 0.450 0.646
174.5 79.2 0.500 0.667
174.1 78.9 0.550 0.689
173.7 78.7 0.600 0.711
173.5 78.6 0.650 0.735
173.3 78.5 0.700 0.760
173.1 78.4 0.750 0.788
173.0 78.3 0.800 0.818
172.9 78.3 0.850 0.854
172.8 78.2 0.900 0.897
172.7 78.2 0.920 0.916
172.7 78.1 0.940 0.936
172.6 78.1 0.960 0.957
172.5 78.1 0.970 0.968
172.4 78.0 0.980 0.979
172.4 78.0 0.990 0.989
172.3 78.0 1.000 1.000
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