题目内容
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[主观题]
对一给定反应，随反应进行其反应速率常数将变小。
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发布时间：2022-01-06
题目内容
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The reaction 2NO2→2NO+O2has an activation energy o...
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℃？
第7题
The decomposition of HI has rate constants k=0.079dm3·mol-1·s-1at 508℃and k=0.24dm3·mol-1·s-1at 540℃. What is the activation energy of the reaction inkJ·mol-1？
第8题
Dinitrogen pentaoxide, N2O5, is the anhydride of n...
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？
第9题
The foll.wing data were measured for the reduction of nitric oxide with hydrogen.
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？
