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The reaction 2NO2→2NO+O2 has an activation energy of 111 kJ·mol-1. At400℃,k=7.8dm3·mol-1·s-1. What i
The reaction 2NO2→2NO+O2has an activation energy of 111 kJ·mol-1. At400℃,k=7.8dm3·mol-1·s-1. What is the value of k at 430℃?
The reaction 2NO2→2NO+O2has an activation energy of 111 kJ·mol-1. At400℃,k=7.8dm3·mol-1·s-1. What is the value of k at 430℃?
A、A. silkworm growing
B、B. silkworm treating
C、C. silkworm breeding
D、D. silkworm counting
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?
2NO(g)+2H2(g)→N2(g)+2H2O(g)
Initial oncentration/(mol·dm-3) | Initial rate of formation of H2O/mol·dm-3·s-1 | |
c(NO) | c(H2) | |
0.10 0.10 0.20 | 0.10 0.20 0.10 | 1.23×10-3 2.46×10-3 4.92×10-3 |
What is the rate equation for the reaction?
一级反应A→B+C,已知A的起始浓度为0.50mol·dm-3,速率常数k=5.3×10-3s-1,试求:这个反应的速率
零级反应A→B+C,已知A的起始浓度为0.36mol·dm-3,完全分解用了1.0h,试求该反应以s-1为单位表示的速率常数。
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