When the temperature of a reaction is increased by 20oC, the rate of reaction increases by
Answer & explanation
Correct answer: option 2
It has been found that for a chemical reaction with rise in temperature by 10°, the rate constant is nearly doubled.
Hence rate of reaction increases.
Let at ToC, Rate of reaction, R = k [A]
At T + 10oC, Rate of reaction, R' = 2k[A]
At T + 12oC, Rate of reaction, R'' = 2(2k[A]) = 4k[A]
When the temperature of a reaction is increased by 20oC, the rate of reaction increases by 4 times.