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: PRTVbaV Vb=−−+()()αwhere: aRTPcc=0 427482.()and bRTPcc=0 08664.and α=+−112STrdiSis given by the following function of the acentric factor, ω. S=+−0 485081551710156132...ωωData for benzene: Tc= 562.1 K; Pc= 48.9 bar; ω= 0.212. The residual Gibbs energy for the S-R-K equation of state is: ()1lnlnlnRVaVGRTZRTZRTVbbVbα=−−++−+2. For a mixture of ngases for which the Lewis fugacity rule is valid, show that the fugacity of
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