# Answer to Question #37859 in Physical Chemistry for chamalis

Question #37859

According to the collision theory model,why does temperature affect the value of the rate constant.

Expert's answer

According to collision theory, the reaction rate constant can be expressed as follows:

k = z0*exp(-Ea/RT)

where z0 is the collision frequency, Ea - activation energy of the process.

z0 = N*sigma*is the reaction cross section, mu is the reduced mass of two reacting particles:

1/mu = 1/m1 + 1/m2

The temperature is included in this equation twice: firstly it exists under exponential; secondly it is included into the collision frequency z0 in power 1/2.

k = z0*exp(-Ea/RT)

where z0 is the collision frequency, Ea - activation energy of the process.

z0 = N*sigma*is the reaction cross section, mu is the reduced mass of two reacting particles:

1/mu = 1/m1 + 1/m2

The temperature is included in this equation twice: firstly it exists under exponential; secondly it is included into the collision frequency z0 in power 1/2.

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## Comments

Assignment Expert18.02.14, 16:23The expression for the reaction rate constant contains temperature, so it depends on temperature.

ASZDxfghjk06.02.14, 10:11you didn't answer the WHY

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