4 FeO(s) + O2(g) �¨ 2 Fe2O3(s)

Question

calculate value of delta H
i have done this
4(-272.0)+0->2(-825.5)
and the products minus reactants and i got -563 but it is not right?!

Answer 1

My table says Fe2O3(s) = -824.2 kJ/mol which gives -560.4 kJ for the reaction.

Answer 2

-556.7

Answer 3

The answer is -560.8