312 For the system n-pentane (1)-n-heptane (2), the vapour pressures are given by the Antoine equation В In P = A 1 T - С

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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K.V.Narayanan book of thermodynamics 

Chapter 8 unsolved problem 8.12

(a) The exit vapour composition
(b) The exit liquid composition
(c) The mole per cent of the feed that is vaporised.
8 12 For the system n-pentane (1)-n-heptane (2), the vapour pressures are given by the Antoine
equation
B
In P = A -
Т-С
where P is in kPa and T is in K. The constants are as follows.
System
C
n-Pentane
13.8183
2477.07
40.00
n-Heptane
13.8587
2911.32
56.56
Assuming that the solution formed is ideal, calculate:
(a) The composition of the liquid and vapour in equilibrium at 95 kPa and 336.2 K.
(b) The composition of the vapour in equilibrium with a liquid containing 34% (mol)
pentane and the equilibrium temperature at P = 95 kPa.
(c) The total pressure and the vapour composition in equilibrium with a liquid of composition
%3D
X = 0.44 at T = 333.2 K.
%3D
8.13 Using Gibbs-Duhem equations prove that if one constituent of a mixture exhibits positive
deviation from ideal behaviour the other constituent also shows positive deviation.
8.14 Prove that a solution exhibiting negative deviation from ideal behaviour is formed with an
Transcribed Image Text:(a) The exit vapour composition (b) The exit liquid composition (c) The mole per cent of the feed that is vaporised. 8 12 For the system n-pentane (1)-n-heptane (2), the vapour pressures are given by the Antoine equation B In P = A - Т-С where P is in kPa and T is in K. The constants are as follows. System C n-Pentane 13.8183 2477.07 40.00 n-Heptane 13.8587 2911.32 56.56 Assuming that the solution formed is ideal, calculate: (a) The composition of the liquid and vapour in equilibrium at 95 kPa and 336.2 K. (b) The composition of the vapour in equilibrium with a liquid containing 34% (mol) pentane and the equilibrium temperature at P = 95 kPa. (c) The total pressure and the vapour composition in equilibrium with a liquid of composition %3D X = 0.44 at T = 333.2 K. %3D 8.13 Using Gibbs-Duhem equations prove that if one constituent of a mixture exhibits positive deviation from ideal behaviour the other constituent also shows positive deviation. 8.14 Prove that a solution exhibiting negative deviation from ideal behaviour is formed with an
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