5. The overall reaction in a commercial heat pack can be represented as 4Fe(s) + 3O2(g) → 2Fe2O3(s), △H = -1652 kJ. How much heat is released when 1.00 g Fe is reacted with excess of O2?
(A) -7390 J
(B) -14760 J
(C)-1650 J
(D) -6600 J
(E)-2200 J 

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統計： A(2), B(0), C(0), D(0), E(0) #2344808