GKFix MCQ Question

How is ∆rH⁰ calculated from ∆fH⁰ values?

• A. Σ∆fH⁰(reactants) – Σ∆fH⁰(products)
• B. Σ∆fH⁰(products) + Σ∆fH⁰(reactants)
• C. Σ∆fH⁰(reactants)
• D. Σ∆fH⁰(products) – Σ∆fH⁰(reactants)