An equimolar solution of benzene and toluene is evaporated at a constant temperature of 90C. What...

  

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An equimolar solution of benzene and toluene is evaporated at a constant temperature of 90C. What are the pressures at the beginning and end of the vaporization? Assume an ideal solution and use the vapor pressure curves of Figure 2.1, or use a process simulator. Vapor Pressure, psi 10,000 6,000 4,000 2,000 1,000 600 400 200 100 60 40 20 10 6 4 2 1 0.6 0.4 0.2 0.1 Critical points Triple point. (Solid CO) -100 Ethylene. i-Butane -75 Carbon dioxide Propane n-Butane n-Pentane -50 Ethane Methyl chloride Ethyl chloride i-Pentane n-Hexane -25 IN Acetone Ethanol Benzene 0 25 Toluene # Octane Acetic Acid # C 100 50 75 Temperature, F Methanol o-Xylene n-Propyl benzene n-Decane 150 Sulfur dioxide n-Heptane 200 Nitrobenzene 250 300 350 400 Figure 2.1 Vapor pressure of some common industrial chemicals. [Reproduced with permission from A.S. Faust, L.A. Wenzel, C.W. Clump, L. Maus, and L.B. Andersen, Principles of Unit Operations, John Wiley & Sons, New York (1960).] Water therm A Dowtherm A Mercury 500 600 700 800 An equimolar solution of benzene and toluene is evaporated at a constant temperature of 90C. What are the pressures at the beginning and end of the vaporization? Assume an ideal solution and use the vapor pressure curves of Figure 2.1, or use a process simulator. Vapor Pressure, psi 10,000 6,000 4,000 2,000 1,000 600 400 200 100 60 40 20 10 6 4 2 1 0.6 0.4 0.2 0.1 Critical points Triple point. (Solid CO) -100 Ethylene. i-Butane -75 Carbon dioxide Propane n-Butane n-Pentane -50 Ethane Methyl chloride Ethyl chloride i-Pentane n-Hexane -25 IN Acetone Ethanol Benzene 0 25 Toluene # Octane Acetic Acid # C 100 50 75 Temperature, F Methanol o-Xylene n-Propyl benzene n-Decane 150 Sulfur dioxide n-Heptane 200 Nitrobenzene 250 300 350 400 Figure 2.1 Vapor pressure of some common industrial chemicals. [Reproduced with permission from A.S. Faust, L.A. Wenzel, C.W. Clump, L. Maus, and L.B. Andersen, Principles of Unit Operations, John Wiley & Sons, New York (1960).] Water therm A Dowtherm A Mercury 500 600 700 800