Problem: 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) Li(s)+12F2(g)→LiF(s) b) Li(s)+12F2(l)→LiF(s) c) H2O2(g)→12O2(g)+H2O(g) d) 2H2(g)+O2(g)→2H2O(g) e) 2Li(s)+F2(g)→2LiF(s) f) H2(g)+12O2(g)→H2O(g)

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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) Li(s)+12F2(g)→LiF(s)

b) Li(s)+12F2(l)→LiF(s)

c) H2O2(g)→12O2(g)+H2O(g)

d) 2H2(g)+O2(g)→2H2O(g)

e) 2Li(s)+F2(g)→2LiF(s)

f) H2(g)+12O2(g)→H2O(g)

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