GKFix MCQ Question

What would be the ∆rH⁰ for the reverse reaction NO₂(g) → NO(g) + ½O₂(g)?

• A. +74 kJ mol⁻¹
• B. -74 kJ mol⁻¹
• C. 0 kJ mol⁻¹
• D. +148 kJ mol⁻¹