GKFix MCQ Question

What is the enthalpy change for the reaction: CO(g) + ½ O₂(g) → CO₂(g)?

• A. +283.0 kJ mol⁻¹
• B. –283.0 kJ mol⁻¹
• C. +393.5 kJ mol⁻¹
• D. –393.5 kJ mol⁻¹