At high temperature, cyclopropane is converted to propene, thematerialfrom which

Question

At high temperature, cyclopropane is converted to propene, thematerialfrom which polypropylene plastics are made. The reactionwas monitored and the data below was collected:
Time (min)    0.00 5.0   10.0 15.0   20.0 [cyclopropane] (M) 0.098 .080 .066 .054 .044
Calculate the average rate of decomposition of cyclopropaneduring the 15 to 20 min time interval.
Time (min)    0.00 5.0   10.0 15.0   20.0 [cyclopropane] (M) 0.098 .080 .066 .054 .044
Calculate the average rate of decomposition of cyclopropaneduring the 15 to 20 min time interval.

Explanation / Answer

Thus                      Average rate = change in concentration of[cyclopropane] / change in time                                            = [cyclopropane] at 15min -  [cyclopropane] at20min / 20.0min - 15.0 min                                           = (0.054 M - 0.044 M) / 5.0min                                           = 0.0452 M/min

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