Solution
= Solution
Since $\gamma'=d\gamma/dT<0$, the <Maxwell relation> gives $(\partial S/\partial A)_T=-\gamma'>0$. Thus \b[isothermal stretching increases the film's <entropy>].
= Solution
Since $\gamma'=d\gamma/dT<0$, the <Maxwell relation> gives $(\partial S/\partial A)_T=-\gamma'>0$. Thus \b[isothermal stretching increases the film's <entropy>].