In the Haber process, ammonia is synthesized from N2 and H2: N2 (g) + 3 H2 (g) ? 2 NH3 (g) DGº at 298 K for this reaction is -33.3 kJ/mol. The value of DG at 298 K for a reaction mixture that consists of 1.9 atm N2, 1.6 atm H2 and 0.65 atm NH3 is kJ.