In which one of the following reactions is deltaH rxn equal to deltaH f of the product?

In which one of the following reactions is deltaH rxn equal to deltaH f of the product? Please show how you identified the 4 wrong answers. Note – no numbers needed, this problem must be answered without per instructor’s instructions. I am just now sure how to do it by sight alone? Please tell me how you arrived at your answer.1. F2(g) H2(g) –> 2HF(g)2. Mg(g) O2(g) –> 2MgO(g)3. NO2(g) O(g) –> NO3(g)4. SO3(g) H2O(g) –> H2SO4(g)5. S O2 –> SO2 {note this formula did not come with type, e.g., g, s, l.}
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