Chapter 12, Problem 50E

For the past 10 years, the unsaturated hydrocarbon 1, 3-butadiene (CH₂ = CH - CH = CH₂) has ranked 38^th among the top 50 industrial Chemicals. It is used primarily for the manufacture of synthetic rubber. An isomer exists also as cyclobutene:

The isomerization of cyclobutene to butadiene is first-order and the rate constant has been measured as $2.0\times {10}^{-4}{\text{s}}^{-1}$ at 150 °C in a 0.53-L ?ask. Determine the partial pressure of cyclobutene and its concentration after 30.0 minutes if an isomerization reaction is carried out at 150 °C with an initial pressure of 55 torr.