A student obtained the following data for the rearrangement of cyclopropane to propene at 500 °C. (CH₂)3(9) CH₂CH=CH₂(9) [(CH₂)3], M time, min 3.53x10-2 0 1.77x10-2 8.85x103 12.5 25.0 (2) Is the reaction zero, first, or second order? 4.43x10-3 37.5 (1) What is the half-life for the reaction starting at t = 0 min? What is the half-life for the reaction starting at t= 12.5 min? Does the half-life increase, decrease or remain constant as the reaction proceeds? # (3) Based on these data, what is the rate constant for the reaction? min min min1

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