A catalyst lowers the activation energy for a certain reaction from 75kJ to 25kJmol−1. The effect on the rate of reaction at 25∘C, other things being equal is :
rate of reaction decreases 5.81×108 times
rate of reaction decreases 6.34×108 times
rate of reaction increases 6.34×108 times
rate of reaction increases 5.81×108 times
A
rate of reaction increases 5.81×108 times
B
rate of reaction decreases 5.81×108 times
C
rate of reaction decreases 6.34×108 times
D
rate of reaction increases 6.34×108 times
Open in App
Solution
Verified by Toppr
The relationship between the rate of the reaction and the activation energy is logk=−Ea2.303RT+logA
This equation in presence and in absence of catalyst can be written as log(k2k1)=−12.303RT(Ea2−Ea1)
Here, Ea2 and Ea1 represents the activation energies in presence and in absence of catalyst and k2 and k1 represents the rate constants in presence and in absence of catalyst.
Hence, the rate of the reaction increase 5.81×108 times.
Was this answer helpful?
2
Similar Questions
Q1
A catalyst lowers the activation energy for a certain reaction from 75kJ to 25kJmol−1. The effect on the rate of reaction at 25∘C, other things being equal is :
View Solution
Q2
Activation energy of a reaction is 100 kJ/mol. By using a catalyst Ea decreases by 75%. What will be the effect on rate of reaction at 200C?
Consider all other things are equal.
View Solution
Q3
The energy of activation for a reaction is 100kJmol−1. Presence of a catalyst lowers the energy of activation by 75%. What will be the effect on rate of reaction at 20oC, other things being equal?
View Solution
Q4
The energy of activation for a reaction is 50 kJ/ mol. The presence of a catalyst lowers the energy of activation by 25 %. What will be the effect on the rate of reaction at 300C ? If the other things remains same.
View Solution
Q5
The activation energy of the reaction is 75kJ/mol in absence of a catalyst and it lowers to 50.14kJ/mol with a catalyst. How many times will the rate of reaction grow in presence of a catalyst if the reaction proceeds at 25∘C?