Question

Chemical Thermodynamics

1. Reactants A and B combine to form product P in the liquid phase reaction:

A+B<>P

But P reacts further to form an undesired byproduct U:

2P »U

The Gibbs energy and enthalpy of each compound at T=300 K and P=1 bar are given in the tablebelow. It is known that A, B, P and U form ideal solutions.

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

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

B. In answering part A, you will notice that second reaction has a larger equilibrium constant than the first, yet there is, at equilibrium, more P than U. Why?


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