Acetone can be converted into ketene and methane by a vapor-phase reaction:

CH₃ COCH₃ ↔ CH₂ CO + CH₄  

Assume ΔC_P = 0 for this process.

A. Since Appendix C contains no data for ketene, use the Joback method to estimate ΔH_f⁰ and   ΔG_f⁰ for this compound. 

B. Plot the equilibrium constant of this reaction, vs. temperature, from T = 25°C to T = 800°C. 

C. A popular Chemical Reaction Engineering text (Fogler, 1992) contains an example in which this reaction is carried out at 1035 K. Based on part B, does 1035 K seem like a well-chosen temperature? 

D. If a reactor has constant T = 1035 K and P = 1 bar, and is filled with pure acetone at the beginning, what fraction of the acetone is converted into products at equilibrium? 

E. 1000 mol/min of pure acetone enters a steady state, adiabatic flow reactor at T = 1035 K and   P = 1 bar, and the stream exiting the reactor is at P = 1 bar and at equilibrium. What is the temperature and composition of the stream leaving the reactor?

Appendix C.

Transcribed Image Text:

Name Argon Tetrachloromethane (carbon tetrachloride) Trichloromethane (chloroform) Methane Methanol Carbon monoxide Carbon dioxide Pentafluoroethane Tetrafluoromethane Chlorodifloromethane (R-22) CHCIF, 369.28 CHCI 536.50 Ethyne (acetylene) 1,1,1-Trifluoroethane Acetonitrile Ethene (ethylene) 1,2-Dichloroethane Ethane Ethanol Propene (propylene) Propanone (acetone) Dimethylcarbonate Formula T(K) 150.86 556.3 Propane 1-Propanol 2-Propanol Ar CCIA CH CH₂OH CO CO₂ C₂HF C₂H₂ C₂H₂F C₂H₂N C₂H₂ C₂H₂CL₂ C₂H₂ C₂H₂O P. (bar) 48.98 45.57 W GH C₂H₂O C₂H₂O₂ C₂H₂ C₂H₂O C₂H₂O 508.30 -0.002 0.194⁰ 227.51 37.45 0.177 49.86 0.221 55.00 0.216⁰ AH vap (kJ/mol) 6.43 29.82 20.22 29.24 190.56 45.99 512.64 80.97 132.85 34.94 304.12 73.74 339.17 36.15 0.305 308.30 61.14 0.189 346.30 37.92 0.259 545.5* 48.33² 0.353² 282.34 50.41 0.087 13.53 523.00 51.00 28.85 305.32 48.72 0.099 14.70 513.92 61.48 0.649 38.56 364.90 46.00 0.142 18.42 508.10 47.00 0.307 29.10 557.00 48.00 0.336 37.7 369.83 42.48 0.152 19.04 536.78 51.75 0.629 41.44 47.62 0.665 39.85 0.011 8.17 0.565 35.21 0.045 6.04 0.225 18.99 AH fus (kJ/mol) 3.28 4.12 8.80 0.94 3.18 0.84 9.02 21.28 6.19 3.35 7.87 2.86 5.01 3.00 5.69 3.53 5.20 5.38 VL (cm³/mol) 29.10 97.07 56.41 59.08 80.68 35.54 40.73 34.88 98.61 43.47 75.38 51.07 84.73 46.15 58.68 73.94 84.82 74.87 75.14 76.92 T(K) for VL 90.00 298.15 153.15 213.15 298.15 90.68 298.15 81.00 293.48 203.15 245.00 183.15 298.15 90.36 298.15 298.15 298.15 233.15 298.15 298.15