The chemical reaction 2 NO(g) + O2(g) ⇌ 2 NO2(g) has ΔGrxn = 72.6 kJ/mol at 100 °C. What is the ΔGrxn (in kJ/mol) at the same temperature when the partial pressure of each substance is 0.15 atm? Group of answer choices 5958 kJ/mol 78.5 kJ/mol 60.8 kJ/mol 84.4 kJ/mol 66.7 kJ/mol