At the beginning of 20 14, smog weather ravaged the central and eastern regions of China many times. Among them, automobile exhaust and coal-fired exhaust are one of the causes of air pollution. (1) s

At the beginning of 20 14, smog weather ravaged the central and eastern regions of China many times. Among them, automobile exhaust and coal-fired exhaust are one of the causes of air pollution. (1) steam (1)① At low temperature? ②0.025 mol L-1 s-1

(2) BC? (3) In the temperature range of 250℃-450℃, the conversion rate of NO x increases with the increase of temperature: the reaction has not established equilibrium, and the reaction must move forward with the increase of temperature; At 450℃-600℃ (high temperature), the reaction has reached equilibrium, so the equilibrium moves in the opposite direction with the increase of temperature, and the conversion rate of NO x decreases with the increase of temperature.

Conclusion At the same temperature, the conversion efficiency of NO is lower than that of NO 2.

Analysis of test questions; Judging whether a reaction is spontaneous or not depends on Gibbs free energy. When Gibbs free energy is less than 0, it can be carried out spontaneously. As can be seen from the table, T 1 reaches equilibrium faster. Therefore, it should be larger than T2 by T 1. However, the amount of carbon dioxide produced by T2 is relatively large, which indicates that the reaction proceeds in the opposite direction of the positive reaction when the temperature decreases, so the positive reaction direction is exothermic. That is, Δ h is less than zero. The gas quantity of reactant is less than that of product, so δ S is less than zero, and δ G = δ H-T δ S is needed to make δ G less than zero, so the reaction can be carried out spontaneously at low temperature. It can be calculated from the table that the ratio of carbon dioxide is equal to 0. 1 divided by 2 equals 0. 050 mol L- 1 S- 1. According to the stoichiometric ratio is equal to the chemical reaction rate ratio, it can be found that v(N 2) is equal to 0.025 mol L- 1 S- 1 (2). (3) (1) At the temperature of 250℃-450℃, the conversion rate of NO x increases with the increase of temperature: the reaction has not yet established equilibrium, and the reaction must move forward with the increase of temperature; At 450℃-600℃ (high temperature), the reaction has reached equilibrium, so the equilibrium moves in the opposite direction with the increase of temperature, and the conversion rate of NO x decreases with the increase of temperature.