Question

A reaction profile (not to scale!) for the reaction C2H5OH + Br® C2H5Br + OH” is shown below: E (KJ) C2H5Br + OH 161 C2H5OH + Br" Reaction Coordinate According to the collision theory of reaction rates, which of the following are true? Choose all that apply. Increasing the concentrations of C,H,OH + Br" would increase the rate of the forward reaction. In the presence of a catalyst, the value of Ea for the forward reaction would be smaller than 161 kJ. At a higher temperature, the rate of the forward reaction will increase because the value of AE will be smaller than 71.0 kJ. In the presence of a catalyst, the value of AE will be smaller than 71.0 kJ. Increasing the concentration of C2H3Br + OH would have no effect on the rate of the reverse reaction.

Answer 1

C. Hy Br + OHO EkJ) 2H50H + Reaction coordinate correct options are: Increasing the concentration of C2H5OH + bor (reactants) would increase the rate of the forward reaction, as we increase the no. of reactants more will be the no. of collision and will be the rate. (option- a) with addition of calalyst activation energy (Ea) decreases. as forward reaction , Ea = 161kJg in presence of catalyst the value of Ea for the forward reaction would be smaller than 160.0 kJ. (option-b). Note: 4€ doesn't depend on temperature and catalyst so option-c & d are incorrect. a with increasing product concentration (C2H5 BrtOH) rate of backward reaction increases, as collision bw products give the reverse reaction. so, option - e also incorrect.