Question
Chemistry Question on Chemical Kinetics
The temperature coefficient of a reaction is 2. If the velocity of the reaction is 5 at 25�C, then, the velocity of the reaction at 55�C is
A
20 times
B
30 times
C
40 times
D
80 times
Answer
40 times
Explanation
Solution
As. temperature coefficient is 2, the rate of reaction becomes double when temperature is raised by 10 degrees. Hence when temperature is increased from 25� to 55� the rate increases in steps of 10�. i.e., 3 times. Hence, rate of reaction should increase 23 times i.e, 8 times. Velocity at 55�C = 5 \times 8 = 40 times