题目内容
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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？
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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？
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