I hate to say this, but Stowe's treatment of chemical potential
is flat-out wrong. For a correct definition of chemical potential
you'll need a different book.
Furthermore, Stowe's uses of the equipartition theorem are sometimes
questionable. In many places he makes statements that are apparently
intended to apply to all thermodynamic systems, when in fact they
apply only to systems consisting of quadratic degrees of freedom
in the classical limit.
These flaws are a shame, because in many ways I really like Stowe's
book. It's very well written and many parts are quite insightful.
I also like the organizational plan. My only other serious complaint
is that it's a bit wordy, sometimes offering breezy explanations
in place of honest calculations.
When I taught out of Stowe's book I discovered a few minor errors
as well which I'd be happy to look up and share if anyone is
interested.