Determine ∆G° for 2 NO₂(g) → N₂O₄(g) at 25 °C. The standard Gibbs free energy change (ΔG°) at 25°C for the dissociation of N₂O₄(g) into NO₂(g) can be calculated using the given standard enthalpies of formation (ΔG°f): NO₂(g): ΔG°f = 51.3 kJ/mol N₂O₄(g): ΔG°f = 97.8 kJ/mol

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