6.14. Estimate the entropy change of vaporization of benzene at 50°C. The vapor pressure of benzene is given by the equation: or In Psat/kPa = 13.8858 ition 6.6 r the assumptions made, (a) Use Eq. (6.86) with an estimated value of AVlv. (b) Use the Clausius/Clapeyron equation of Ex. 6.6. Combination of the last two equations gives, on rearrangement: d In Psat dT AZv=Z-Z¹ = en by Eq. (6.87), psat vv RT = AHv=-R- - 2788.51 t/°C + 220.79 psat vl RT d In Psat DOTY AHlv RT2 AZlv = 1-0 =1 (6.87)

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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6.14. Estimate the entropy change of vaporization of benzene at 50°C. The vapor pressure
of benzene is given by the equation:
or
In Psat/kPa = 13.8858 -
(a) Use Eq. (6.86) with an estimated value of AVlv.
(b) Use the Clausius/Clapeyron equation of Ex. 6.6.
Combination of the last two equations gives, on rearrangement:
d In Psat
dT
ition 6.6
r the assumptions made,
AZv=Z-Z¹ =
en by Eq. (6.87),
psat vv
RT
2788.51
t/°C + 220.79
AHv=-R-
AHlv
RT2 AZ
psat vl
RT
d In Psat
d(1/T)
= 1-0 =1
(6.87)
Transcribed Image Text:6.14. Estimate the entropy change of vaporization of benzene at 50°C. The vapor pressure of benzene is given by the equation: or In Psat/kPa = 13.8858 - (a) Use Eq. (6.86) with an estimated value of AVlv. (b) Use the Clausius/Clapeyron equation of Ex. 6.6. Combination of the last two equations gives, on rearrangement: d In Psat dT ition 6.6 r the assumptions made, AZv=Z-Z¹ = en by Eq. (6.87), psat vv RT 2788.51 t/°C + 220.79 AHv=-R- AHlv RT2 AZ psat vl RT d In Psat d(1/T) = 1-0 =1 (6.87)
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