1. Calculate AHrxn° for the reaction: 2 N₂(g) + 5 O₂(g) → 2 N₂O5(g) from the following data: N₂O5(g) + H₂O(l) → 2 HNO3(1) N₂(g) + 3 O₂(g) + H₂(g) → 2 HNO3(1) 2 H₂(g) + O₂(g) → 2 H₂O(l) AHrxn° = -76.6 kJ AHrxn° = -348.2 kJ AHrxn° = -671.6 kJ

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