How is the standard enthalpy change for a reaction (∆rH⁰) calculated using formation enthalpies?

Question

Accepted Answer

∑aᵢ∆fH⁰(products) – ∑bᵢ∆fH⁰(reactants)

Answer

∆fH⁰(reactants) + ∆fH⁰(products)

Answer

∑aᵢ∆fH⁰(products) + ∑bᵢ∆fH⁰(reactants)

Answer

∆fH⁰(products) – ∆fH⁰(reactants)

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