Just when I finally calculated -113 kJ/mol you change your answer on me again. Gees. MasteringChemisty marked -401.6 as the correct answer. I guess it could be a mistake. It didn't look like any of the examples in my textbook anyway. I'll ask the Professor about it next time I see him. Hopefully a question like this won't he on the test. The chapter review doesn't mention anything about the combustion of nitromethane.
How do I calculate the standard enthalpy of formation (ΔH∘f) for nitromethane?