GKFix MCQ Question

How is the enthalpy change for a gaseous reaction estimated using bond enthalpies?

• A. ∆rH⁰ = Σ bond enthalpies of products – Σ bond enthalpies of reactants
• B. ∆rH⁰ = Σ bond enthalpies of reactants – Σ bond enthalpies of products
• C. ∆rH⁰ = average bond energy
• D. ∆rH⁰ = ∆U + p∆V