Look at the following reaction.

Suppose that you are given the following information for this reaction at room temperature:
for SO₂(g) = -300.19 kJ/mol
for O₂ = 0.0 kJ/mol
for SO₃ = -371.1 kJmol
Find the value for ΔG° for this reaction and state whether the forward reaction is spontaneous, non-spontaneous, or at equilibrium.
a. ΔG° = 141.8 kJ / mol. The forward reaction is spontaneous.
b. ΔG° = 70.91 kJ / mol. The forward reaction is non-spontaneous.
c. ΔG° = 141.8 kJ / mol. The forward reaction is non-spontaneous.
d. ΔG° = 141.8 kJ / mol. The reaction is at equilibrium.