Using the Standard Free Energies of Formation:
NO₂(g) $\Delta$ G°_f = +51

Using the standard free energies of formation:
NO₂(g) , $\Delta$ G°_f = +51.84 kJ mol^-1
NO(g) , $\Delta$ G°_f = +86.69 kJ mol^-1
SO₂(g) , $\Delta$ G°_f = -300.0 kJ mol^-1
SO₃(g) , $\Delta$ G°_f = -370.0 kJ mol^-1
Calculate the standard free energy change, $\Delta$ G°, for the reaction:NO₂(g) + SO₂(g) $\rarr$ NO(g) + SO₃(g)

A) -35.15 kJ mol^-1
B) -104.9 kJ mol^-1
C) -429.2 kJ mol^-1
D) -619.6 kJ mol^-1
E) +35.15 kJ mol^-1