Cyclobutane decomposes to ethylene according to the equation c4h8(g) ⟶ 2c2h4(g) determine the order of the reaction and the rate constant based on the following pressures, which were recorded when the reaction was carried out at 430°c in a constant-volume vessel. time (s) pc4h8 (mmhg) 0 400 2,000 316 4,000 248 6,000 196 8,000 155 10,000 122