Supercritical CO2 can be used to extract benzoic acid from a solid phase. Assume that the mixture is well-modeled with the Peng-Robinson equation of state with kij=0.043. Determine the composition of benzoic acid in the gas phase and the enhancement factor ( E, equation 12.1-18a) at 70C as a function of pressure from 1 to 300bar. For benzoic acid, Tc=752.2K, Pc=45 bar, =0.620,s=1.26g/cc and the sublimation pressure has the following form where T is in K,PEsub=10(12.8669T4775,7) in mmHg