The standard molar Gibbs free energy of formation of NO 2 (g) at 298 K is 51.30 kJ·mol−1 and that of N2O4 (g) is 97.82 kJ·mol−1. What is the equilibrium constant at 25°C for the reaction
2 NO2(g) ⇌ N2O4(g) ?
3. 7.01 × 10−9
5. None of these
6. 1.02 × 10−10
7. 9.72 × 109
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