ОХ46 Indicate which of the reactions of formation of ox

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46. Indicate which of the reactions of formation of oxides and at what temperatures (high or low) may occur spontaneously under standard conditions:
2N2 (g) + O2 (g) = 2N2O (g) H0298> 0;
N2 (g) + O2 (g) = 2NO (g) H0298> 0;
2NO (g) + O2 (g) = 2NO2 (a) H0289> 0;
NO (g) + NO2 (g) = N2O3 (a) H0298> 0;
N2 (g) + 2O2 (g) = 2NO2 (a) H0298> 0.