Gibbs energy and entropy of activation

Equation (33.36), the Eyring equation, we can generalize to apply to any elementary reaction, 

The equilibrium constant can be written in terms of a standard Gibbs energy of activation AG  

A negative entropy of activation will result in a quite low frequency factor, while a positive entropy of activation will raise its value. The probability factor introduced in the collision 

The usual degree superscript used to designate a standard Gibbs energy is omitted on the symbol AG to avoid a cumbersome symbol. 

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