This text presents the thermodynamic properties of individual substances, specifically focusing on boron and its compounds, as well as other elements like aluminum, gallium, indium, thallium, beryllium, magnesium, calcium, strontium, and barium, along with their compounds. The content is part of a larger work that includes volumes and parts, with each volume containing detailed tables and methods for calculating thermodynamic properties. The third volume, part one, covers methods and computations for boron and its compounds, including various forms such as crystalline, amorphous, and vitreous states. The text includes references to scientific literature, discussions with experts, and updates based on new data. It also provides thermodynamic data for a wide range of substances, including gases and condensed phases, with calculations up to high temperatures. The work is a comprehensive resource for thermodynamic properties, with detailed tables and explanations, and it has been revised and updated based on the third Russian edition. The text also includes a list of substances covered in the volumes and references to various scientific studies and authors who contributed to the compilation of the data.This text presents the thermodynamic properties of individual substances, specifically focusing on boron and its compounds, as well as other elements like aluminum, gallium, indium, thallium, beryllium, magnesium, calcium, strontium, and barium, along with their compounds. The content is part of a larger work that includes volumes and parts, with each volume containing detailed tables and methods for calculating thermodynamic properties. The third volume, part one, covers methods and computations for boron and its compounds, including various forms such as crystalline, amorphous, and vitreous states. The text includes references to scientific literature, discussions with experts, and updates based on new data. It also provides thermodynamic data for a wide range of substances, including gases and condensed phases, with calculations up to high temperatures. The work is a comprehensive resource for thermodynamic properties, with detailed tables and explanations, and it has been revised and updated based on the third Russian edition. The text also includes a list of substances covered in the volumes and references to various scientific studies and authors who contributed to the compilation of the data.