a) The dimerisation of 1,3-butadiene, C4H6 in the gaseous phase is a second order reaction. 2C4H6(g)C8H12(g)H=150kJmol1 [A]6M An experiment was carried out at 300C to determine the (rate constant)for the above reaction. When 0.1M of C4H6 was used, the initial reaction rate was 5.83105Ms1.) ievo ordec i. Write the rate law for the reaction. ii. Determine the rate constant for the reaction at 300C. iii. By using the same concentration of C4H6, calculate the new rate constant at 400C if the initial reaction rate is 1.70103Ms1. iv. Determine the activation energy for the reaction using the Arrhenius equation. [6 marks] b) Sketch and label an energy profile diagram for the dimerisation of 1,3-butadiene