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. Check all that apply. H2O2(g)

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.

Check all that apply.

H2O2(g)→12O2(g)+H2O(g)

Li(s)+12Cl2(l)→LiCl(s)

2Li(s)+Cl2(g)→2LiCl(s)

2H2(g)+O2(g)→2H2O(g)

Li(s)+12Cl2(g)→LiCl(s)

H2(g)+12O2(g)→H2O(g)

I need to get an understanding of how its done.