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Prbset07

# Prbset07 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO...

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CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.: CHEG5301 STUDENT: ___________________ COURSE: Thermodynamics INSTRUCTOR: Prof. Anderson SUBJECT: Problem Set 07 DUE: Wednesday, Oct. 8, 2008 1. The Clausius-Clapeyron equation assumes the quantity, ( ) v v B H R Z = ∆ , is constant. i.e.: ( ) ( ) ln 1 sat d P B d T = − Integrating with respect to 1/ T and introducing the constant of integration, A , yields: ( ) ln sat B P A T = Apply this equation at the critical point and the normal boiling point to determine the constants A and B for both methanol and n -hexane. Use this correlaton to then predict the saturation pressure of each compound at a reduced temperature of 0.8. Compare the predicted saturation pressure with experimental values at this temperature. 2. A good estimate of the latent heat of vaporization of 1,3-butadiene at 60 ° C is required. The vapor pressure of 1,3-butadiene is given by the equation: ln . . ( ) . P T sat kPa K b g = 137578 2142 66 3430 3. Natural gas (essentially pure methane) is being compressed prior to transmission by pipe line.

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