At high temperatures, cyclopropane is converted to propene, the material from wh

ID: 807538 • Letter: A

Question

At high temperatures, cyclopropane is converted to propene, the material from which polypropylene plastics are made.Given the following concentration data, test whether the reaction is first order.

Yes

Correct Answer

Calculate the value of the rate constant.

Express your answer using two significant figures.

.0452 is NOT the correct answer!!! The right answer has to be in s^-1. 2.712 is also NOT the right answer. Pleaseee help! I'm in real trouble with this question.

Time (min) 0 5.0 10.0 15.0 20.0 Cyclopropane 0.098 0.080 0.066 0.054 0.044

Explanation / Answer

Becasue the reaction follows first order kinetics,

ln[A] - ln [Ao] = -kT

I am assuming for the [A] = 0.08M and [Ao] = 0.098M. You can use any set of values.

so, t = 5 mins = 5 x60 = 300 sec

putting values in the equation,

ln (0.08) - ln (0.098) = - k x 300

k = 6.76E-4 s-1

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At high temperatures, cyclopropane is converted to propene, the material from wh

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