ChBE 2120 HW3 soln

ChBE 2120 HW3 soln - ChBE 2120 Homework 3 Solution 6-6-07...

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ChBE 2120 Homework 3 Solution 6-6-07 1. No numerical answer. 2. 1332 kW 3. For Antoine: 1361 kW For UNIQUAC: 1351 kW 4. Antoine eqn: log(P sat )=A-B/(T+C) The Antoine equation is not a full equation of state in that it does not provide a PVT relationship. Rather, it is an empirical equation that gives a relationship between a substance’s saturation pressure and temperature. The constants A, B, and C are specific to individual substances, and are only valid for gases in a certain temperature range. Peng-Robinson: The Peng-Robinson equation of state is a cubic equation of state. It is derived from the Van der Wals equation of state. It correctly predicts vapor-liquid equilibrium and is especially accurate in regions near the critical temperature and pressure. It was originally derived for use in the oil/natural gas industry but is applicable to many VLE systems. The model does not take into account deviations from molecular sphericity and is not accurate for polar molecules. The constants a and b, which represent the attractive
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ChBE 2120 HW3 soln - ChBE 2120 Homework 3 Solution 6-6-07...

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