Heat of combustion per mole and per kilogram I need to calculate the heat of combustion per mole and per kilogram of complete combustion of, say, X.


I write reaction : $\ce{X + O2 -&gt; ... + Q}$
Find Q using Hess law


Now, what do I do after that?
Q is the heat of combustion per mole. Next, you would use the formula weight to determine the heat of combustion per g (or kg).