Review Homework For Kinetics Test

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Showing revision 5

1. Answer the following questions in complete sentences. What is the name of the theory (and give a one sentence explanation) that all of kinetics are based on? For my class, what two words must be in all answers (except reaction mechanism problems) and what two factors determines it.

2. Using the format (steps 1-4 and kinetic diagram) given in the last class, explain three different ways you can increase the rate of reaction. You will need to use the back of this page in addition to the space below.

3. One mechanism for the destruction of ozone (O₃) in the upper atmosphere is

O_3(g) + NO_(g) --> NO_2(g) + O_2(g) Slow
NO_2(g) + O_(g) --> NO_(g) + O_2(g) Fast
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O_3(g) + O_(g) ---> 2 O_2(g) Overall Reaction

(It may be easier to answer a & b if you first thing about the definitions)
a. Which species are catalysts.
b. Which species are intermediate.
c. I did some experiments and found that if I increased the concentration of O₃, the rate of reaction increased and if I increased the concentration of O_(g), the rate of reaction also would increase. Does the above reaction mechanism support this data or not? Explain.

4. In the space below show the potential energy diagram for an exothermic reaction. On this graph show how adding a catalyst will increase the rate of reaction. Then write a sentence or two to explain the change in the graph that explain the change in rate of reaction.