Consider the Gas Phase Reaction

Consider the gas phase reaction
NO + (1/2) O₂ NO₂
for which ΔH° = -57.0 kJ and K = 1.5 × 10⁶ at 25°C.
-Calculate ΔG° at 25°C for the following reaction:
2NO + O₂ 2NO₂

A) -57.0 kJ
B) -5.91 kJ
C) -70.5 kJ
D) +5.91 kJ
E) +70.5 kJ