GKFix MCQ Question

For which reaction is ΔH equal to ΔU?

• A. CaCO₃(s) → CaO(s) + CO₂(g)
• B. N₂(g) + 3H₂(g) → 2NH₃(g)
• C. H₂(g) + Cl₂(g) → 2HCl(g)
• D. 2H₂O₂(l) → 2H₂O(l) + O₂(g)