KineticsI - KINETICS I N.B. These questions come from old...

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KINETICS I N.B. These questions come from old prelims papers. If parts of questions are repeated (particularly in part a) of the questions) you don’t have to answer them multiple times, just refer back to your original answer. I’ve left the entire questions in because sometimes what is asked in the first part of a question provides a clue as to how to proceed in later parts. QUESTION 1 a) Why does the rate of most chemical reactions increase when the temperature is raised? b) The rate constant for the decomposition of HI into H 2 +I 2 shows the following temperature dependence: k / dm 3 mol -1 s -1 3.13x10 -6 7.90x10 -5 3.20x10 -3 0.10 T / K 550 625 700 830 Determine the activation energy for the reaction, and the pre-exponential factor A in the Arrhenius equation. c) What is the overall reaction order for the decomposition? What justification do the data in the table above give for the form of the rate equation? d) The reaction between hydrogen and iodine to form hydrogen iodide is believed to proceed via a chain mechanism. using this reaction as an example, explain the meanings of the terms initiation , propagation
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This note was uploaded on 05/09/2010 for the course CHE 3051 taught by Professor Sitimachmud during the Spring '08 term at National Central University.

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KineticsI - KINETICS I N.B. These questions come from old...

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