Experiments have established that the rate coefficient for the reaction H + H2O2 OH + H2O is given by the expression k20= 1.0 10^10 exp (-1800/T) dm3mol-1s-1. If Hand S for the reaction are -285 kJ mol-1 and 24.5 J K-1 mol-1 respectively, obtain an Arrhenius expression for the rate coefficient of the reverse reaction.