Prbset07

Prbset07 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.:...

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CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.: CHEG301 STUDENT: ___________________ COURSE: Thermodynamics INSTRUCTOR: Prof. Anderson SUBJECT: Problem Set 07 DUE: Wednesday, Oct. 10, 2007 1. Natural gas (essentially pure methane) is being compressed prior to transmission by pipe line. The gas enters the compressor at 25 ° C and 10 bar and is isothermally compressed to 200 bar. Assuming that the compressor operates reversibly, evaluate H, Q, and W s for the compression process if (a) The natural gas behaves as an ideal gas. (b) The natural gas behaves according to the van der Waals equation of state. The van der Waals equation of state is: P RT Vb a V = () 2 where: a RT P c c = 27 64 2 and b RT P c c = 8 and for methane, T c = 190.6 K and P c = 46.0 bar. 2. For the Soave modification of the Redlich-Kwong equation, derive an expression for the residual Entropy, S R . The Soave-Redlich-Kwong equation is: P RT a VV b = + ()() α where: a RT P c c = 0 42748 2 . and b RT P c c = 0 08664 .
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Prbset07 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.:...

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