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)

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FREE Expert Solution

Recall that the equation for ΔH°rxn is: 

Hrxn=products-reactants

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).

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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)