GKFix MCQ Question

What is the enthalpy change for the reaction: H₂(g) + ½ O₂(g) → H₂O(l)?

• A. +285.83 kJ mol⁻¹
• B. –285.83 kJ mol⁻¹
• C. +393.5 kJ mol⁻¹
• D. –393.5 kJ mol⁻¹