What is Free Energy?On this page, I hope to provide an intuitive explanation of what free energy means. Since we'll be drawing many pictures of and minimizing it in different contexts, it will be useful what exactly this function represents. Free Energy is minimized in equilibriumOperationally, we care about the free energy because The equilibrium value of is one that minimizes the free energy . So it's rather straighforward to ‘‘do thermodynamics’’ once we know : we just have to take its derivative w.r.t. , set it equal to zero, and then solve for . However, this seemingly innocent claim contains a whole world of microscopic details, such as
Below, I hope to answer some of these questions. Motivation: probabilities of ‘‘mesostates’’Will be completed one day… Summary
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