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3 worked examples connecting ΔG to equilibrium. Example 1: 'Calculate ΔG° at 298K for N₂O₄(g) ⇌ 2NO₂(g). ΔH° = +57.2 kJ/mol, ΔS° = +176 J/mol/K.' Work: ΔG° = 57.2 - (298)(0.176) = 57.2 - 52.4 = +4.8 kJ/mol. Positive → reactants favored at 298K (but barely!). T_crossover = 57200/176 = 325K (above thi

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