GKFix MCQ Question

What is the standard enthalpy change for the reaction: C(graphite,s) + O2(g) → CO2(g)?

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