For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?
You do not need to look up any values to answer this question.
Check all that apply.

A) 2Li(s) + CI2 (g) --> 2LiCl(s)

B) Li (s) + 1/2 Cl2 (l) -> LiCl (s)

c) BaCo3 (s) -> BaO ( s) + CO2 (g)