At 298 K the reaction N₂(g) + 3 H₂(g) → 2 NH₃(g) has a standard enthalpy change of…

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

At 298 K the reaction N₂(g) + 3 H₂(g) → 2 NH₃(g) has a standard enthalpy change of −92.2 kJ. The standard enthalpies of formation of N₂(g) and H₂(g) are 0 kJ mol⁻¹. Determine the standard enthalpy of formation, ΔH_f°, of NH₃(g) in kJ mol⁻¹.

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