Reactants A and B combine to form product P in the liquid phase reaction: A₁ B ↔ P But P reacts further to form an undesired by-product U: 2P ↔ U The Gibbs free energy and enthalpy of each com pound at T = 300 K and P = 1 bar are given in Table P14-18. It is reasonable to assume that both reactions have ΔC_P = 0 and that A, B, P, and U form ideal solutions. 

The feed entering a steady-state reactor is 1000 mol/hr each of compounds A and B. The reactor is at a uniform pressure of 1 bar. 

A. Determine the equilibrium composition of the exit stream at 300 K. 

B. Determine the equilibrium composition of the exit stream at 600 K. 

C. The second reaction has a larger equilibrium constant than the first, yet there is, at equilibrium, more P than U. Why?

Transcribed Image Text:

TABLE P14-18 Compound A B P U H00 (kJ/mol) 40 40 95 200 G900(kJ/mol) 30 25 70 150