Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Using the rate law and the rate constant you calculated in Question 17, calculate the reaction rate exactly 2.5 h from the start. Do your results from this and Question 16 agree with the statement in the text that the smaller the time interval, the more accurate the average rate?
Question 16
Using data from Question 15, calculate the average rate over the interval 0 to 5.0 h. Compare your result with the average rates over the intervals 1.0 to 4.0 h and 2.0 to 3.0 h, all of which have the same midpoint (2.5 h from the start).
Question 17
Using all your calculated rates from Question 15, (a) Show that the reaction obeys the rate law
(b) Evaluate the rate constant k as an average of the values obtained for the six intervals.
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