Cyclopropane is the smallest cyclic hydrocarbon. Because its 60 degree bond angle allows poor orbital overlap, its bonds are weak. As a result, it is thermally unstable and rearranges to propene at 1000 C via a first order reaction. The rate constant is 92 s^-1.

What is the half-life of the reaction?

How long does it take for the concentration of cyclopropane to reach one-quarter of the intial value?