4. Butadiene reacts to form a dimer according to the equation 2C4H6'g) → C8H12(g). The rate constant k = 3.68 at 303K for this reaction. If the initial pressure of the pure feed = 944.75 mmHg, and after 71.0 min, the pressure of the mixture was found to be 502.985mmHg at 303K, determine the order of the reaction and express the units of the rate constant in terms of moles, litres and minutes.

In a study of the decomposition of hydrogen iodide on a gold surface at 150 °C HI(g)% H,(g) + % »(9) the following data were obtained: HI], M seconds 0.274 0.137 6.85×10-2 3.43x10-2 521 782 912 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 0.274 M is s and when the starting concentration is 0.137 M is (2) The average rate of disappearance of HI from t= 0s to t= 521 s is| Ms!. (3) The average rate of disappearance of HI from t= 521 s to t= 782 s is| Ms! (4) Based on these data, the rate constant for this | | order reaction is Ms!.

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11). The hydrolysis (the degradation) of maltose (a type of sugar) is monitored with respect to time. The data collected for this experiment are as shown in the table below. The degradation reaction is: Maltose glucose + glucose Time, (min) Maltose, M 0.316 0.274 39 80 140 0.238 0.190 Use the integrated rate law to determine the order of the reaction and write the rate law and determine the value of k for this degradation reaction.