We know that the Arrhenius Constant (A) is the frequency factor of the collision between particles. Know my question is: Where that equation came from?

To answer this question, we need to write a sample of reaction equation like as follows:

To answer this question, we need to write a sample of reaction equation like as follows:

Okay now, we have to know that the relation between the Enthalpy Change and Activation energy is:

And the equilibrium constant of the equation above is:

First we have to write the law of the rate of equation for that reaction above:

Substitute this equation with the equilibrium constant so that:

r = k [X]

Substitute this equation with the equilibrium constant so that:

Know we connect the equilibrium constant with Gibbs Free Energy and we will get:

Now, we substitute this equation to our rate law so that:

This rate equation, k, is the same as the frequency of collision right? So that:

k' is the new rate constant (similar to the pseudoconstant), from here, we can conclude that the value of A is:

PS: kb is the Boltzmann Constant and h is the Planck Constant.

SOURCE:

Documents of Pelatnas 2 IChO 2012

Taught by: Raden Aditya Wibawa Sakti - ITB

SOURCE:

Documents of Pelatnas 2 IChO 2012

Taught by: Raden Aditya Wibawa Sakti - ITB

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