GKFix MCQ Question

Which of the following reactions has a ∆rH° equal to twice the ∆fH° of the product?

• A. C(graphite, s) + 2H2(g) → CH4(g)
• B. H2(g) + Br2(l) → 2HBr(g)
• C. CaO(s) + CO2(g) → CaCO3(s)
• D. H2(g) + ½O2(g) → H2O(l)