Use Hess's law to calculate ( Δ G°ᵣxn ) using the following information.
( NO(g) + O(g) → NO₂(g) quad Δ G°ᵣxn = -199.5 , kJ )
( 2O₃(g) → 3O₂(g) quad Δ G°ᵣxn = 489.6 , kJ )
( O₂(g) → 2O(g) quad Δ G°ᵣxn = 463.4 , kJ )
a. 753.5 kJ
b. 277.0 kJ
c. -1152.5 kJ
d. -676.0 kJ