a) The dimerisation of 1,3-butadiene, CaHs, in the gaseous phase is a second order reaction. 2C4He () → CaH2 (g) AH- -150 kJ mol An experiment was carried out at 300 C to determine the rate constant for the above reaction. When 0.1 M of CHs was used, the initial reaction rate was 5.83x 10* M s i Determine the rate law for the reaction. ii. Determine the the rate constant for the reaction at 300'C. By using the same concentration of CaHe,calculate the new rate constant at 400 'C if the initial reaction rate is 1.70 x 10' M s Determine the activation energy for the reaction using the Anhenius equation, ii. iv.

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