GKFix MCQ Question

What is the standard enthalpy change for the reaction: CO(g) + 1/2 O₂(g) → CO₂(g)?

• A. –393.5 kJ mol⁻¹
• B. –283.0 kJ mol⁻¹
• C. –110.5 kJ mol⁻¹
• D. +283.0 kJ mol⁻¹