PS8 - ChBE 3110, Fall Semester, 2009 Chemical Engineering...

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ChBE 3110, Fall Semester, 2009 Chemical Engineering Thermodynamics II Problem Set Eight 1. A liquid hydrocarbon A has a saturation pressure of 13.3 kPa at 10 o C. Its density at 25 o C is 0.80 g cm -3 and its molecular weight is 160. This is all the information available on pure liquid A. An equimolar mixture of A in carbon disulfide at 10 o C gives an equilibrium partial pressure of A equal to 8 kPa. Estimate the composition of the vapor that at 10 o C is in equilibrium with an equimolar liquid solution of A in toluene, using the following data: Carbon disulfide Toluene Solubility parameters at 25 o C (J cm -3 ) 1/2 20.5 18.2 Liquid mmolar volumes at 25 o C (cm 3 mol -1 ) 61 107 Saturation pressures at 10 o C (kPa) 1.73 25.5 2. A binary liquid mixture contains nonpolar components 1 and 2. The mixture is to be separated by ordinary distillation. To determine if this is feasible, it is necessary to know whether the mixture has an azeotrope. At 300 K the pure- component vapor pressures are 12 53.3 and 80 SS P P kPa  . The pure-component
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PS8 - ChBE 3110, Fall Semester, 2009 Chemical Engineering...

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