How is the standard reaction enthalpy calculated using standard enthalpies of formation?

Question

Accepted Answer

∆rH⁰ = Σn∆fH⁰(products) – Σm∆fH⁰(reactants)

Answer

Σ∆fH⁰(reactants) + Σ∆fH⁰(products)

Answer

Σ∆fH⁰(reactants) – Σ∆fH⁰(products)

Answer

Σ∆fH⁰(products)

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