The textbook was prepared at the Department of General Chemistry of the Faculty of Chemistry of Voronezh State University . Recommended for students of the 1st year of full-time and evening departments of natural faculties . The proposed manual does not claim to be a consistent statement of the basics of thermodynamics - this has already been done in the textbook "General Chemistry". According to the authors, the proposed development will allow a new look at some of the problems of thermodynamics and with the help of specific examples to tell in more detail about those aspects of this discipline that, due to limited volume, could not enter the textbook.