Training Manual . — SPb: ITMO University, 2015. — 38 s. The textbook was developed in accordance with the program of the course "Thermodynamics and Molecular Physics" of the State Standard of Higher and Professional Education for bachelors in the areas of training 16. 03. 01 - "Technical Physics" and the program of the course "Technical and Chemical Thermodynamics" of the State Standard of Higher and Professional Education for bachelors in the areas of training 14. 03. 01 - "Nuclear Energy and Thermal Physics" . The present edition includes lectures on the elements of chemical thermodynamics and phase transformations. The conditions of equilibrium of heterogeneous systems and conditions of chemical equilibrium, the law of acting masses, the Gibbs phase rule, phase transitions of the first and second kind. are considered.