A process takes place at constant $T$ and V$.$ For this process, $S_{\text{u}\text{n}\text{i}\text{v}}=5\frac{J}{K}.$ What is the change in the Helmholz free energy if $T=300K?$ What is the maximum work that could be extracted from this process?

A process takes place at constant $T$ and $P.$ The temperature is $300K.$ For this process,