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Discuss the effect of catalyst on the ac...

Discuss the effect of catalyst on the activation energy.

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Catalyst lowers the activation energy. It provides an alternate path for the reaction. Catalyst increases the rate of reaction by lowering the activation energy. Lower the activation energy, faster will be the rate of reaction. It can be shown diagrammatically as :
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Arrhenius studies 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) . This 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. If x is the fraction of molecules having energy greater than E_(a) it will be given by : a) x=-(E_(a))/(RT) b) In x=-(E_(a))/(RT) c) x=e^(E_(a)//RT) d) Any of these

Arrhenius studies the effect of temperature on the rate of a reaction and postulted that rate constant varies with temperature exponentially as k=Ae^(E_(a)//RT) . Thuis 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. The pre-exponetial factor in the Arrhenius equation of a first order reaction has the unit : a) mol L^(-1)s^(-1) b) L mol^(1)s^(-1) c) s^(-1) d) dimensionless

Arrhenius studies the effect of temperature on the rate of a reaction and postulted that rate constant varies with temperature exponentially as k=Ae^(E_(a)//RT) . Thuis 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. If the rate of reaction doubles for 10^(@)C rise of temperature form 290K to 300K, the activation energy of the reaction will be approximately: a) 40 Kcal mol^(-1) b) 12 Kcal mol^(-1) c) 60 Kcal mol^(-1) d) 70 Kcal mol^(-1)

At 27^@C in the presence of a catalyst, the activation energy of a reaction is lowered by 10 kJ mol^-1 . The ratio of log k (catalyst)/k (uncatalysed) is

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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 gets lowered to 50 kJ mol^-1 at 300 K. How many times the reaction rate changes in the Presence of a catalyst at the same temperature ?

OMEGA PUBLICATION-CHEMICAL KINETICS -MULTIPLE CHOICE QUESTIONS (MCQ s)
  1. Discuss the effect of catalyst on the activation energy.

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  2. Consider the chemical reaction, N (2) (g) + 3 H (2)(g) to 2 NH (3) (...

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  3. For a reaction involving solid, decreasing which given below will incr...

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  4. Rate of first order reaction depends upon

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  5. Under a given set of experimental conditions, with increase of concent...

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  6. Rate at which a substance reacts depends upon its

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  7. RCOO R ' + Na OH to RCOO Na + R ' OH. What type of reaction is this ?

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  8. Units of rate constant for the first and zero order reactions in terms...

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  9. Units of specific reaction rate for 2nd order reaction is

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  10. The units of rate constant for first order equation.

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  11. The hydrolysis of ester in alkaline medium is a

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  12. Given the unit of second order rate constant

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  13. The half life period of a zero order reaction is independent of initia...

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  14. What is the effect of temperature on rate of a reaction.

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  15. The activation energy of reaction is equal to

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  16. The activation energy of a reaction can be determined by

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  17. The wavelength of first spectral line in the balmer series is 6561 ang...

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  18. The substance that increases the speed of a chemical reactions is call...

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  19. The reaction rate is found to depend upon two concentration terms. The...

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  20. For which of the following , the units of r constant and rate of the r...

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  21. A zero order reaction is one whose rate independent of

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