Use the given standard enthalpies of formation to calculate ΔH° for the following reaction
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g) . 
A) -5213.4 kJ
B) -577.2 kJ
C) -47.2 kJ
D) +47.2 kJ
Correct Answer:
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