GKFix MCQ Question

How is the standard enthalpy of reaction (∆rH⁰) related to bond enthalpies in gas-phase reactions?

• A. ∆rH⁰ = Σ bond enthalpies (products) – Σ bond enthalpies (reactants)
• B. ∆rH⁰ = Σ bond enthalpies (reactants) + Σ bond enthalpies (products)
• C. ∆rH⁰ = Σ bond enthalpies (reactants) – Σ bond enthalpies (products)
• D. ∆rH⁰ = 0