Chapter 17, Problem 17.28QP

The equilibrium constant (K_P) for the reaction

${\text{H}}_2(g)+{\text{CO}}_2(g)\stackrel{}{\rightleftharpoons }{\text{H}}_{\text{2}}\text{O}(g)+\text{CO}(g)$

is 4.40 at 2000 K. (a) Calculate ΔG° for the reaction. (b) Calculate ΔG for the reaction when the partial pressures are $P_{{\text{H}}_2}=0.25$ atm, $P_{{\text{CO}}_2}=0.78$ atm, $P_{{\text{H}}_2{\text{O}}_{}}=0.66$ atm, and P_CO = 1.20 atm.