EK 1001Qs #369: Under standard conditions, which of the following reactions will have the greatest difference between enthalpy and energy of reaction? A. 2C(graphite) + O2(g) --> 2CO(g) B. C(graphite) + O2(g) --> CO2(g) C. C(graphite) --> C(diamond) D. CO(g) + NO2(g) --> CO2(g) + NO(g) The correct answer is A. I don't even get how to tackle the Q, frankly. Why must gen chem be 1000Xs worse than o-chem? help?