# Question: a common model for polymer configurational entropy considers each link...

###### Question details

A common model for polymer configurational entropy considers each link in the polymer chain backbone to have only three possible values (the three staggered angles, 60, 180, 300) of χ, the dihedral angle, all with the same probability and all independent of each other. For a polymer with N monomer units, there are N-1 links. One “configuration” of the polymer means one possible choice for all the N-1 dihedral angles, χ1,χ2,...,χN-1.

a) Find and expression for the probability, *p(one*
*configuration) = W (one configuration)/W(all possible
configurations)* , of finding the polymer in just one of its
possible configurations.