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.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current