Question

HELP ASAP

For which one of the following reactions is the value of H°rxn equal to H°f for the product?
2H2 (g) + O2 (g) →2H2O (l)
N2 (g) + O2 (g) →2NO (g)
H2O (l) + 1/2O2 (g) →H2O2 (l)
2H2 (g) + O2 (g) →2H2O (g)
none of the above

Answer 1

the answer is 1.) 2H2(g)+O2(g)--->2H2O(g)

2.) N2(g)+O2(g)--->2NO(g)