The new textbook of chemical thermodynamics is written in accordance with modern university programs for chemists and chemists - technologists. It contains a representative description of the foundations of thermodynamic science along with a more concise presentation of the issues of phase and chemical equilibria, solution theory, electrochemical thermodynamics and the principles of thermodynamics of surface phenomena. The book uses the material of lectures that the author gave for a number of years to students of the 2nd and 3rd years of the Russian Chemical Technical University named after D.I. Mendeleev. The textbook is distinguished by concreteness and brevity, accuracy of wording, lack of general words and lengthy reasoning. Thanks to this, the author managed to outline in a small book? most of the modern course of physical chemistry. At the same time, the book cannot be considered a short guide - it is a full-fledged textbook. Problems with solutions are given. For students, graduate students and teachers of chemical faculties and universities.