help please?

Question

The value of the equilibrium constant for the reaction of nickel(II) ions with cadmium metal is 1.17 × 105. Calculate ΔG° for the reaction at 25°C.
-12.6 kJ
-28.9 kJ
12.6 kJ
28.9 kJ
none of the above

Answer 1

ΔG° = -RTlnK = -8.314*298*ln(1.17*10^5) = -28.9 kJ