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)+12cl2(l)→licl(s) 2li(s)+cl2(g)→2licl(s) co(g)+12 o2(g)→ co2(g) c(s, graphite)+ o2(g)→ co2(g) li(s)+12cl2(g)→licl(s)

2Li(s)+Cl2(g)→2LiCl(s)

C(s,graphite)+ O2(g)→ CO2(g)

6Li(s)+12Cl2(g)→6LiCl(s)

Explanation:

Hello,

The following reactions:

2Li(s)+Cl2(g)→2LiCl(s)

C(s,graphite)+ O2(g)→ CO2(g)

6Li(s)+12Cl2(g)→6LiCl(s)

Are characterized by the presence of just elements in the reagents, thus, their enthalpy of formation is cero, so the change in the enthalpy of reaction is equal to the enthalpy of formation of the products.

Best regards.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.