Boltzmann's Relation
[Sperling 72]
Boltzmann's relation relates the entropy of mixing to the Boltzmann
constant,
, and to 
, the number
of possible arrangements in space that the molecules may assume.
(Sperling- 72) (Elias- 212)
is the sum of polymer and solvent
molecules.
Recall that is the number of solvent
molecules and
is the number of polymer molecules.
You need
Stirling's approximation, shown below, to solve for
, because your
calculator can't solve N! if N is greater than 69.
Last Update- June 23, 1995- wld