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Prbset09

# Prbset09 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO...

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CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.: CHEG5301 STUDENT: ___________________ COURSE: Thermodynamics INSTRUCTOR: Prof. Anderson SUBJECT: Problem Set 09 DUE: Wednesday, Oct. 22, 2008 1. Use the Soave modification of the Redlich-Kwong equation of state to calculate the vapor pressure of benzene at its reported normal boiling point of 80.1 ° C. The Soave-Redlich- Kwong equation is: P RT V b a V V b = + ( ) ( ) α where: a RT P c c = 0 42748 2 . ( ) and b RT P c c = 0 08664 . and α = + 1 1 2 S T r d i S is given by the following function of the acentric factor, ω . S = + 0 48508 155171 015613 2 . . . ω ω Data for benzene: T c = 562.1 K; P c = 48.9 bar; ω = 0.212. The residual Gibbs energy for the S-R-K equation of state is: ( ) 1 ln ln ln R V a V G RT Z RT Z RT V b b V b α = + + + 2. For a mixture of n gases for which the Lewis fugacity rule is valid, show that the fugacity of
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