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. view available hint(s) check all that apply. caco3(g)→ cao+ co2(g) li(s)+12f2(g)→lif(s) co(g)+12 o2(g)→ co2(g) 2li(s)+f2(g)→2lif(s) li(s)+12f2(l)→lif(s) c(s,graphite)+ o2(g)→ co2(g)

reaction 2,5,6

Explanation:

First, we need to define what the enthalpy of formation is and what the enthalpy of reaction is

Formation Enthalpy: It is the variation of the calorific energy in the reaction of ONE MOL of a compound starting from the elements.

Reaction Enthalpy: It s the variation of the calorific energy in the reaction of reactives, in this cases could be any quantity of mol

Then: We have six reactions:

1)CaCO3(g)→ CaO+ CO2(g)

2)Li(s)+12F2(g)→LiF(s)

3)CO(g)+12 O2(g)→ CO2(g)

4)2Li(s)+F2(g)→2LiF(s)

5)Li(s)+12F2(l)→LiF(s)

6)C(s,graphite)+ O2(g)→ CO2(g)

The enthalpy of reaction will be equal to reaction enthalpy when we produce one mol from elements

The answer is the reactions 2,5,6