反应N2+2O2====N2O4,,降低温度,反应速率将______;化学平衡将______。
反应N2+2O2====N2O4,,降低温度,反应速率将______;化学平衡将______。
反应N2+2O2====N2O4,,降低温度,反应速率将______;化学平衡将______。
A.保持体积不变,通入Ar
B.通入Ar,保持总压不变,体积增大
C.使体系体积减至一半
D.体系温度降低
A.保持体积不变,通入Ar
B.通入Ar,保持总压不变,体积增大
C.使体系体积减至一半
D.体系温度降低
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?
A.错误
B.正确
A.反应(1)的活化能小于反应(2)
B.反应(1)的反应速率常数大于反应(2)
C.反应(1)对A的反应级数小于反应(2)
D.反应(1)对A的反应级数大于反应(2)