Consider the Following System at Equilibrium at 25°C:
PCl₃(g)+ Cl₂(g) $\Delta$

Consider the following system at equilibrium at 25°C:
PCl₃(g) + Cl₂(g) PCl₅(g)
for which $\Delta$ H° = -92.5kJ at 25°C.
-Water gas,a commercial fuel,is made by the reaction of hot coke carbon with steam. C(s) + H₂O(g) CO(g) + H₂(g)
When equilibrium is established at 844°C the concentrations of CO,H₂,and H₂O are 4.00 $\times$ 10^-2,4.00 $\times$ 10^-2,and 1.00 $\times$ 10^-2 mole/liter,respectively.Calculate the value of $\Delta$ G° for this reaction at 844°C.

A) 12.9 kJ
B) -12.87 kJ
C) 55.64 kJ
D) 17.02 kJ
E) none of these