Styrene can be hydrogenated to ethyl benzene at moderate conditions in both the liquid phase and the gas phase. Calculate the equilibrium compositions in the vapor and liquid phases of hydrogen, styrene, and ethyl benzene at each of the following conditions:

a. 3-bar pressure and 25°C, with a starting mole ratio of hydrogen to styrene of 2 to 1 

b. 3-bar pressure and 150°C, with a starting mole ratio of hydrogen to styrene of 2 to 1 

Data:  

Reaction stoichiometry:

Appendix A.II.

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C6H5HC=CH₂ + H₂ → C6H5CH₂CH3 Physical properties: Species Styrene C8H8 Ethyl benzene C8H10 Hydrogen Cg Hs C8H10 8 VL (cal/cc)¹/2 (cc/mol) 9.3 30.8°C 25.9 10.1 3.25 116 123 3.1 Heat capacity: See Appendix A.II. Vapor pressure: AfGo (gas, 1 bar and 25°C) 213.9 kJ/mol 130.9 kJ/mol 0.0 1.333 kPa 13.33 53.32 101.3 202.6 506.5 82.0 122.5 145.2 74.1 113.8 136.2 163.5 207.5