Home
Class 12
CHEMISTRY
A catalyst lowers the activation energy ...

A catalyst lowers the activation energy for a certain reaction from 83.314 to 75 KJ `"mol"^(-1)` at 500 K . What will be the rate of reaction as compared to uncatalyst reaction ? Assume other things being equal

A

Double

B

28 times

C

7.38 times

D

`7.38 xx 10^(3)` times

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.93 To Q.122)|20 Videos
  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.123 To Q.150)|10 Videos
  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.33 To Q.62)|3 Videos
  • SURFACE CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 3 - Assertion - Reason Type Questions|1 Videos

Similar Questions

Explore conceptually related problems

If the activation energy for the forward reaction is 150kJ mol^(-1) and that of the reverse reaction is 260kJ mol^(-1) . What is the enthalpy change for the reaction

The energies of activation for forward and reverse reactions for A_(2)+B_(2)to2AB are 280kJ"mol"^(-1) and 400kJ"mol"^(-1) respectively. The presence of catalyst lowers the activation energy of both forward as well as reverse reactions by 100KJ"mol"^(-1) . The enthalpy change of the reaction A_(2)+B_(20to2AB in the presence of catalyst will be (in KJ "mol"^(-1) )

A catalyst lowered the energy of activation by 25 kJ mol^(-1) .How many times , the rate reaction increases?

At 25^(@)C the activation energy for a catalysed reaction is 126 KJ mol^(-1) and for uncatalysed reaction is 350 KJ mol^(-1) . How many times the rates is increased in the presence of catalyst ?

The activiation energy for the reaction 2HI(g) to H_(2) + I_(2)(g) is 209.5 KJ mol^(-1) at 581 K.Calculate the farction of molecules of reactants having energy equal to or greater than activation energy ?

A: A catalyst increases the rate of a reaction. R: In presence of a catalyst, the activation energy of the reaction increases.

(A)Catalyst increases the rate of reaction. (R ) Catalyst functions by lowering the energy of activation.

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. If the rate oc reaction grwos 15.6 times on increasing the temperature by 30 K the temperature coefficient of the reaction will be nearly

With 100 kJ mol- activation energy for an uncatalysed reaction at 20°C, the catalyst lowers the energy of activation by 75%. What will be the effective rate if other conditions are same?