Practice question
Question
The standard enthalpy change for the reaction N₂(g) + 3H₂(g) → 2NH₃(g) is given by:
Explanation
The standard enthalpy change for a reaction forming a compound from its elements in their standard states is the enthalpy of formation (Δf H°) multiplied by the moles formed. For 2NH₃, Δ H = 2 × Δf H° (NH₃).
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