Answered: For an Ethanol(1)-iso-octane(2) mixture…

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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For an Ethanol(1)-iso-octane(2) mixture at 50 degrees celcius, the infinite dilution liquid-phase activity coefficients are gama1=21.15 and gama2=9.82

a) Calculate the constants A'12 and A'21 in the Van Laar equations

b) Calculate the constants A12 and A21 in the wilson equations.

c) How well do the van Laar and wilson predictions(write down equations) agree with the azeotrope point at x1=0.594, gama1=1.42, and gama2=2.16 as obtained from the laboratory experiment?

d)At 50 degrees, from experiments it is found that the vapor pressures are 29.45 kPa for ethanol and 19.25 KPa for isooctane. Using activity coefficient values obtained from Van Laar equation in part(c), calculate pressure and vapor phase composition for x1=0.42 in the liquid solution.

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