Seeking to introduce molecular thermodynamics in a way that is more congruent with the present day, it approaches the subject from a statistical basis, rather than traditional phenomenological bulk phase behavior and continuum mechanics arguments. Thus, topics are discussed in a different sequence than is encountered in more traditional texts; the presentation of material begins with the molecular argument and later expands to bulk phase behavior. Chapters cover thermal and mechanical processes, structured particle systems and interacting particle systems, multicomponent systems, macroscopic process considerations, electrolyte systems, and more. Worked examples and end-of-chapter problems are included.