GKFix MCQ Question

What is the ∆rH⁰ for the reaction: 1/2 H₂(g) + 1/2 Cl₂(g) → HCl(g)?

• A. –92.32 kJ mol⁻¹
• B. +92.32 kJ mol⁻¹
• C. –46.16 kJ mol⁻¹
• D. +46.16 kJ mol⁻¹