GKFix MCQ Question

Which of the following reactions has a positive ∆rH⁰ according to the text?

• A. 1/2 N₂(g) + O₂(g) → NO₂(g)
• B. 1/2 N₂(g) + H₂(g) → NH₃(g)
• C. H₂(g) + 1/2 O₂(g) → H₂O(l)
• D. 1/2 H₂(g) + 1/2 Cl₂(g) → HCl(g)