100 moles of an Acetonitrile-Nitromethane mixture is differentially distilled in a batch still at a pressure of 70 kPa. The feed contains 74 mole % acetonitrile. Distillation is continued till the liquid left behind in the still contains 32 mole % acetonitrile. The vapor-liquid equilibria for the system at this pressure are correlated as follows: y* = 1.05r, +0.13 for 0.3 r< 0.52 and for 0.52 < I < 0.80 y* = 0.77x + 0.28 where r and y* refer to the mole fractions of acetonitrile in the lqiuid and equilibrium vapor respectively. Find the average composition of the distillate collected.
100 moles of an Acetonitrile-Nitromethane mixture is differentially distilled in a batch still at a pressure of 70 kPa. The feed contains 74 mole % acetonitrile. Distillation is continued till the liquid left behind in the still contains 32 mole % acetonitrile. The vapor-liquid equilibria for the system at this pressure are correlated as follows: y* = 1.05r, +0.13 for 0.3 r< 0.52 and for 0.52 < I < 0.80 y* = 0.77x + 0.28 where r and y* refer to the mole fractions of acetonitrile in the lqiuid and equilibrium vapor respectively. Find the average composition of the distillate collected.
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
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:100 moles of an Acetonitrile-Nitromethane mixture is differentially distilled in a batch still at
a pressure of 70 kPa. The feed contains 74 mole % acetonitrile. Distillation is continued till
the liquid left behind in the still contains 32 mole % acetonitrile. The vapor-liquid equilibria
for the system at this pressure are correlated as follows:
y* = 1.05z + 0.13 for 0.3K x < 0.52 and
y* = 0.77x + 0.28 for 0.52 < I < 0.80
where z and y* refer to the mole fractions of acetonitrile in the lqiuid and equilibrium vapor
respectively.
Find the average composition of the distillate collected.
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