GKFix MCQ Question

What is the correct formula to calculate ∆rH° for a chemical reaction?

• A. Σ ai∆fH°(reactants) + Σ bi∆fH°(products)
• B. Σ ai∆fH°(reactants) – Σ bi∆fH°(products)
• C. Σ ai∆fH°(products) + Σ bi∆fH°(reactants)
• D. Σ ai∆fH°(products) – Σ bi∆fH°(reactants)