Activation Energy Temperature Dependence

[Sirajbir Sodhi 2K]

Why is activation energy independent of temperature? I would think that it would decrease as temperature increases because of the increased rate of collisions?

[lindsay lathrop 2C]

Activation energy is technically the minimum amount of Kinetic Energy needed for a a collision to result in a reaction (according to the collision theory). The higher the temperature the more Kinetic energy is present meaning the higher the likelihood we will reach this level and end up with a reaction as a result of the collision. With a rise of temperature we are climbing the reaction graph approaching the activation barrier, therefore, we are closer to the activation energy but the activation energy has not itself changed.

[lindsay lathrop 2C]

Adding on: Although it is mostly independent, what you did point does happen to a certain extent which is why the book states "Both A and Ea are nearly independent"

[Christy Lee 2H]

Does what you described have to do with the frequency factor at all?

[Akash_Kapoor_1L]

I'm pretty certain that the variable A is also defined as the frequency factor.

[Sirajbir Sodhi 2K]

I think it does have to do with the frequency factor more than the activativation energy -- thank you.