For a gaseous reaction standard conditions are 298 K as well as a partial pressure of 1 atm for all species. For the reaction
N2(g) + 3H2(g) --> 2NH3(g) the standard change in Gibbs free energy is ?G° = -72.6 kJ/mol. Explain what is G for this reaction at 298 K while the partial pressures are PN2=.200 atm, PH2=.250 atm and PNH3=.950 atm