For which one of the following reactions is ΔH°rxn equal to the heat of formation of the product?
A) N2 (g) + 3H2 (g) → 2NH3 (g)
B) (1/2)N2 (g) + O2 (g) → NO2 (g)
C) 6C (s) + 6H (g) → C6H6 (l)
D) P (g) + 4H (g) + Br (g) → PH4Br (l)
E) 12C (g) + 11H2 (g) + 11O (g) → C6H22O11 (g)