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18 Nov 2019
6) A reaction is found to have an activation energy of 38.0 kJ/mol. If the rate constant for this reaction is 1.60 x 102 M1sl at 249 K, what is the rate constant at 436 K? A) 2.38 Ã 105 M-1 s-1 B) 1.26 Ã 103 M-1s-1 C) 7.94 x 104 M-1s1 D) 4.20 Ã 105 M-1 s-1 E) 3.80 x 104 M1s-1 7) The experimental rate law for the decomposition of nitrous oxide (N 0) to N2 and O2 is Rate [N O]. Two mechanisms are proposed: Which of the following could be a correct mechanism? A) Mechanism I, with the first step as the rate-determining step. B) Mechanism I, with the second step as the rate-determining step as long as the first step is a fast equilibrium step. Mechanism II, with the second step as the rate-determining step if the first step is a fast equilibrium step None of the choices (A-C) could be correct. At least two of the above choices (A-C) could be correct. C) D) E)
6) A reaction is found to have an activation energy of 38.0 kJ/mol. If the rate constant for this reaction is 1.60 x 102 M1sl at 249 K, what is the rate constant at 436 K? A) 2.38 Ã 105 M-1 s-1 B) 1.26 Ã 103 M-1s-1 C) 7.94 x 104 M-1s1 D) 4.20 Ã 105 M-1 s-1 E) 3.80 x 104 M1s-1 7) The experimental rate law for the decomposition of nitrous oxide (N 0) to N2 and O2 is Rate [N O]. Two mechanisms are proposed: Which of the following could be a correct mechanism? A) Mechanism I, with the first step as the rate-determining step. B) Mechanism I, with the second step as the rate-determining step as long as the first step is a fast equilibrium step. Mechanism II, with the second step as the rate-determining step if the first step is a fast equilibrium step None of the choices (A-C) could be correct. At least two of the above choices (A-C) could be correct. C) D) E)
Collen VonLv2
3 May 2019