8. (10 points) Show that the entropy of mixing in the Flory-Huggins theory (e.g._, for polymer solution) can be derived from that of IG mixtures, i.e., by mixing pure 1G 1 and 2 (at P1 and P2, respectively) at constant T such that Avmgxzo. This means that the Flow-Huggins the01y actually has nothing to do with polymers (i.e., chain confmmations), but is just about the sizes (molecular volumes) of the two species