N2O5的分解反应2N2O5=4NO2+O2是复杂反应.实验测定:318K时,它在CCl
试确定反应的速率方程式,并据此提出合理的反应机理(假设N2O5→N2O5+O2反应为控制步骤).
试确定反应的速率方程式,并据此提出合理的反应机理(假设N2O5→N2O5+O2反应为控制步骤).
反应:2N2O5(g)====4NO2(g)+O2(g)
起始时N2O5(g)浓度为1.15mol·dm-3,100s后测得N2O5(g)浓度为1.0mol·dm-3,则反应在100s内的平均速率为多少?
某温度下,N2O5按下式分解:
由实验测得在67℃时N2O5浓度随时间的变化如下:
试求:
(1)0-2min内的平均反应速率;
(2)t=2min时的瞬时反应速率。
反应在某温度时速率系数为2.31×10-3s-1,计算:
(1)反应进行了10min后,N2O5分解的百分率;
(2)N2O,分解反应的半衰期。
Dinitrogen pentaoxide, N2O5, is the anhydride of nitric acid. It is not very stable, and in the gas phase or in solution with a nonaqueous solvent it decomposes by a first-order reaction into N2O4and O2. The rate equation is
v=kc(N2O5)
At 45℃, the rate constant for the reaction in carbon tetrachloride is 6.22×10-4s-1. Ifthe initial concentration of the N2O5in the solution is 0.100mol·dm-3, how many minuteswill it take for the concentration to drop to 0.0100 mol·dm-3?
Suggest tests which could be used to distinguish among NO, N2O5, and NO2.
等温下在间歇反应器中进行一级液相不可逆分解反应 A→B+C,在5min内有50%的A分解,要达到分解率90%,问需要多少时间?