The energy of activation for a reaction is `100 KJ mol^(-1)`. The peresence of a catalyst lowers the energy of activation by `75%`. What will be the effect on the rate of reaction at `20^(@)C`, other things being equal?

The energy of activation for a reaction is 50kJ/ mol. Presence of a catalyst lowers the energy of activation by 25%. What will be the effect on rate of reaction at 30^(@) C- Other things remains same.

The energy of activation for a reaction is 100 kJ/mol. Presence of a catalyst lowers the energy of activation by 75%. The ratio of k_(cat)//K_(uncat) at (T=298K) is :

The energy of activation for ab uncatalysed reaction is 100KJ mol ^(-1) presence of a catalyst lowers the energy of activation by 75% . The log _(10).K_2/K_1 of the ratio of rate constant of catalysed and uncatalysed reactions at 27^@C is ? Assume the frequency factor is same for both reactions. ( Given 2.303xx8.314 = 19.147 )

A catalyst lowers the activation energy for a certain reaction from 75 kJ to 25" kJ mol"^(–1) . What will be the effect on the rate of reaction at 25^(@)C , after things being equal.

Consider the reaction A to 2B + C, Delta H = -15 kcal . The energy of activation of backward reaction is 20 kcal mol^(-1) . In presence of catalyst, the energy of activation of forward reaction is 3 kcal mol^(-1) .At 400 K the catalystcauses the rate of the forward reaction to increase by the number of times equal to -

The activation energy of H_(2)+I_(2) hArr 2HI(g) in equilibrium for the forward reaction is 167 kJ mol^(-1) whereas for the reverse reaction is 180 kJ mol^(-1) . The presence of catalyst lowers the activation energy by 80 kJ mol^(-1) . Assuming that the reactions are made at 27^(@)C and the frequency factor for forwatd and backward reactions are 4xx10^(-4) and 2xx10^(-3) respectively, calculate K_(c) .

The activation energy of a first order reaction at 300 K is 60 kJ "mol"^(-1) . In the presence of a catalyst, the activation energy is lowered to 50 kJ "mol"^(-1) at the same teperature. How many times the rate of reaction will change ?