GKFix MCQ Question

What is the standard enthalpy of formation of NH3 gas? Given: N2(g) + 3H2(g) → 2NH3(g); ∆rH° = -92.4 kJ mol–1.

• A. -92.4 kJ mol–1
• B. -46.2 kJ mol–1
• C. +46.2 kJ mol–1
• D. +92.4 kJ mol–1