# Problem: For which of the following reactions is ΔH°rxn equal to ΔH°f of the product(s)?2Na(s) + Cl2(g) → 2NaCl(s)H2(g) + 12O2(g) → H2O(g)Na(s) + 12Cl2(g) → NaCl(s)H2O2(g) → 12O2(g) + H2O(g)2H2(g) + O2(g) → 2H2O(g)Na(s) + 12Cl2(l) → NaCl(s)

###### FREE Expert Solution

Recall that the equation for ΔH°rxn is:

$\overline{){\mathbf{∆}}{{\mathbf{H}}}_{\mathbf{r}\mathbf{x}\mathbf{n}}{\mathbf{=}}\left(\mathbf{p}\mathbf{r}\mathbf{o}\mathbf{d}\mathbf{u}\mathbf{c}\mathbf{t}\mathbf{s}\right){\mathbf{-}}\left(\mathbf{r}\mathbf{e}\mathbf{a}\mathbf{c}\mathbf{t}\mathbf{a}\mathbf{n}\mathbf{t}\mathbf{s}\right)}$

Where:

(products) = sum of ΔH°f of products

(reactants) = sum of ΔH°f of reactants

For this problem, we are asked the find the reaction where ΔH°rxn is equal to ΔH°of the product(s).

87% (200 ratings) ###### Problem Details

For which of the following reactions is ΔH°rxn equal to ΔH°f of the product(s)?

2Na(s) + Cl2(g) → 2NaCl(s)

H2(g) + 12O2(g) → H2O(g)

Na(s) + 12Cl2(g) → NaCl(s)

H2O2(g) → 12O2(g) + H2O(g)

2H2(g) + O2(g) → 2H2O(g)

Na(s) + 12Cl2(l) → NaCl(s)