GKFix MCQ Question

What is the standard enthalpy change for the decomposition of one mole of CO₂ into C and O₂?

• A. –393.5 kJ mol⁻¹
• B. +393.5 kJ mol⁻¹
• C. 0 kJ mol⁻¹
• D. +787.0 kJ mol⁻¹