GKFix MCQ Question

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

• A. Σ∆fH⁰(reactants) + Σ∆fH⁰(products)
• B. Σ∆fH⁰(reactants) – Σ∆fH⁰(products)
• C. Σ∆fH⁰(products)
• D. ∆rH⁰ = Σn∆fH⁰(products) – Σm∆fH⁰(reactants)