For which of the following reactions is ΔH∘rxnΔHrxn∘ equal to ΔH∘fΔHf∘ 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. 2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g) →2NaCl(s) Na(s)+12Cl2(l)→NaCl(s)Na(s)+12Cl2(l )→NaCl(s) CaCO3(g)→CaO+CO2(g)CaCO3(g)→CaO+CO2 (g) C(s)+O2(g)→CO2(g)C(s)+O2(g)→CO2(g) CO(g)+12O2(g)→CO2(g)CO(g)+12O2(g)→C O2(g) Na(s)+12Cl2(g)→NaCl(s)Na(s)+12Cl2(g )→NaCl(s) Submit Part B

- 2Na(s)+Cl2(g)→2NaCl(s)

- Na(s)+1/2Cl2(l)→NaCl(s)

- C(s)+O2(g)→CO2(g)

Explanation:

Hello,

In this case, we shall remember that formation reactions are those involving the direct reaction of the elements forming the required compound. In such a way, for the given reactions:

2Na(s)+Cl2(g)→2NaCl(s)

Na(s)+1/2Cl2(l)→NaCl(s)

CaCO3(g)→CaO+CO2(g)

C(s)+O2(g)→CO2(g)

CO(g)+1/2O2(g)→CO2(g)

Just:

2Na(s)+Cl2(g)→2NaCl(s)

Na(s)+1/2Cl2(l)→NaCl(s)

C(s)+O2(g)→CO2(g)

Involve the elements composing the final products at the reactants. For that reason, the enthalpy of reaction (ΔH°rxn) result equal to the enthalpy of formation (ΔH°f) of the given product.

Regards.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."