In some chemical reactions, it is found that a larage number of colliding molecules have energy more than threshold energy value, yet the reactions are quite slow. Explain.

In general it is observed that the rate of a chemical reaction doubles with every 10^@ rise in temperature. If the generalisation holds for a reaction in the temperature range 295K to 305K, what would be the value of activation energy for the reaction?

The activation energy of a reaction 2H I_(g) rarrH_2 + I_(2(g)) is 209.5 kJ mol^-1 at 581K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy?

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at 25^@C are 3xx10^(-4)s^(-1),104.4kJmol^(-1) and 6xx10^(-14)s^(-1) respectively. The value of the rate constant at T rarr prop is