Question

For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction

2NO(g) + O2 <----> 2NO2(g)

the standard change in Gibbs free energy is ΔG° = -72.6 kJ/mol. What is ΔG for this reaction at 298 K when the partial pressures are

Pno= 0.200atm, Po2= 0.400atm, Pno2= 0.650atm

delta G=? ......kj/mol