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The Rate constant of a reaction doubles with a ___________ rise in temperature.
Question

The Rate constant of a reaction doubles with a ___________ rise in temperature.

A.

40 degrees

B.

10 degrees

C.

30 degrees

D.

20 degrees

Correct option is B

Sol: The correct answer is (b) 10 degrees

Key Points:

  • ​The rate constant of a reaction doubles with a 10 degrees rise in temperature.
  • This relationship is commonly observed and is supported by the Arrhenius equation, which describes how the rate constant increases with temperature.
  • This is due to an increase in the number of particles that have the minimum energy required.

​Arrhenius equation:

k=AeEaRTk= Ae^{-\frac{E_a}{RT}}

k= rate constant

A= pre-exponential factor (frequency factor)

EaE_a​​= activation energy (the minimum energy required for a reaction to occur)

R= universal gas constant (8.314 J/mol·K)

T= absolute temperature in Kelvin

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