ABSTRACT
4The particular structure of many thermodynamic equations can be mimicked by the aid of graphs both directed and simple graphs. Starting points are two types of directed graphs (also digraphs), the energy-digraph, or E-digraph, and the entropy digraph, or S-digraph. The most important thermodynamic relationships can be modeled by the aid of these two tools plus a set of simple rules and a series of symmetry operations performed with simple graphs superposed on the previous digraphs. Actually, in this way, not only the most famous thermodynamic relations can be derived in a fully automatic way, but the“machinery” can also be used to solve some thermodynamic problems.
