To which one of the following reactions occurring at 25°C does the symbol ΔH°f[HNO3(l)] refer?
(A) H(g) + N(g) + O3(g) → HNO3(l)
(B) (1/2)H2(g) + (1/2)N2(g) + (3/2)O2(g) → HNO3(l)
(C) HNO3(l) → (1/2)H2(g) + (1/2)N2(g) + (3/2)O2(g)
(D) HNO3(l) → H(g) + N(g) + 3O(g)
(E) H2(g) + N2(g) + O3(g) → HNO3(l)
