Energy of Binding on First and Second Sites

We define the energy change corresponding to the two processes described in the previous subsection, i.e., processes (3,2.33) and (3.2.35). These are obtainable by differentiation of (3.2.34) and (3.2.36) with respect to jS = 

Comparing (3.2.51) with (3.2.52), we see that there are three factors that make AE g different from 

The change in the average energy of the polymer, induced by the binding of G. 

The reason for writing (3.2.53) in the last form will be clear in subsection 3.2.6. Note also that in this section and Eh are treated as if they truly are energy levels, hence temperature independent. In reality these are Helmholtz energy levels and therefore in general are temperature dependent. 

The energy change corresponding to the reaction (3.2.44) can be easily calculated from 

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