Which of the following defines the heat of formation of Fe2O3 (s) ?
A) 2 Fe (g) + 3 O (g) → Fe2O3 (s)
B) 2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s)
C) 4 Fe (s) + 2 O3 (g) → 2 Fe2O3 (s)
D) 2 Fe (g) + 3 O (g) → Fe2O3 (g)
E) none of these
Correct Answer:
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