CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.: CHEG5301 STUDENT: ___________________ COURSE: Thermodynamics INSTRUCTOR: Prof. Anderson SUBJECT: Problem Set 12 DUE: Wednesday, Nov. 12, 2008 1. At atmospheric pressure the system carbon tetrachloride-ethyl alcohol exhibits an azeotrope at 61.3 mole percent CCl4with a boiling point 64.95°C. The vapor pressures CCl4and C2H5OH at this temperature are 530.9 and 448.8 mm Hg, respectively. (a) Calculate the activity coefficients of each component in the liquid phase for the above azeotropic composition. (b) Using the van Laar equation, estimate the activity coefficients of CCl4and C2H5OH for a mixture containing 50 mole percent CCl4. 2. Liquids A and B when mixed form an azeotrope at 300K and at a mole fraction of xA= 0.5. It is desired to separate a mixture of A and B by distillation and in order to "break" the azeotrope, it is proposed to add a third liquid, C, into the mixture. Compute the relative volatility of A to B at 300K when the ternary mixture contains 60 mole % C and equal molar amounts of A and B.
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This note was uploaded on 08/26/2010 for the course CHEG 5301 taught by Professor Anderson during the Fall '08 term at UConn.