Answer to Question #263503 in General Chemistry for Maxpien

Question

Calculate ΔG° at 298 K for each reaction:

(a) 2H2S(g) + 3O2(g) ⥫⥬ 2H2O(g) + 2SO2(g); K = 6.57×10173

(b) H2SO4(l) ⥫⥬ H2O(l) + SO3(g); K = 4.46×10−15

Answer 1

DeltaG = -RTlnK

a) T= 298K

K= 6.57×10173

R = 8.314K×J/mol

DeltaG = -8.314J/Kmol×298K×ln(6.57×10173)

= -991.6kJ/mol

B) k = 4.46×10-15

DeltaG = - 8.314J/Kmol×298K×ln(4.46×10-15)

DeltaG = -81.87kJ/mol