"A collection of problems on the general course of physics. Book II. Thermodynamics and Molecular Physics” is an indispensable assistant for students, teachers and anyone who seeks to understand the fundamental principles of nature through the prism of practical problems and solutions. The author's team, which unites experienced teachers and researchers, created this collection in order to make the study of thermodynamics and molecular physics not only understandable, but also an exciting journey into the world of physical processes occurring around us. This book is not just a collection of exercises, but a real guide to complex concepts, revealing them through a variety of tasks, from simple to very complex, with detailed solutions and comments. In it you will find a wide range of tasks covering the main sections of the course: the laws of thermodynamics, thermal processes, molecular-kinetic theory, heat transfer, entropy and much more. Each task is an opportunity to test your knowledge, consolidate theoretical foundations and learn how to apply them in practical situations. The book is intended for university students studying physics in the first and second years, as well as for teachers looking for high-quality material for preparing for lectures and test papers. It is perfect for those who want to prepare for exams or simply expand their knowledge in the field of thermodynamics and molecular physics. Age audience - from junior students to graduate students, as well as enthusiasts who want to understand how the laws of nature work at the molecular level The peculiarity of this book is not only the wealth of tasks, but also the clarity of their solutions. The authors tried to make each explanation as accessible as possible, avoiding complex formulations without explaining what makes the book a valuable tool for independent learning and repetition of the material covered. It raises important topics such as the laws of thermodynamics, thermal equilibrium, statistical interpretation of entropy, molecular kinetic theory, and heat transfer processes. These topics are relevant not only for students, but also for those who are interested in modern areas of physics and their practical application. A special place in the book is occupied by the authors’ approach to solving problems: they not only show the correct answer, but also analyze each solution in detail, explaining logic and physical principles, which helps the reader to understand not only “how”, but also “why” this or that method works. This approach contributes to the development of analytical thinking and the ability to independently solve complex problems. If we talk about the style, the author's team adheres to a clear and accessible presentation, which makes the book attractive even for those who are just beginning to get acquainted with thermodynamics and molecular physics. At the same time, the level of complexity of the tasks allows you to delve into the material and prepare for more complex sections of physics. In General, "The collection of problems on the general course of physics. Book II. Thermodynamics and Molecular Physics is not just a textbook, but a reliable satellite in the study of one of the most important and interesting areas of modern physics. For those who appreciate the practical approach and want not only to know the theory, but also to be able to apply it in practice, this book will be a real discovery. It will help to understand how the laws of nature work at the molecular level, and will teach you to see physical processes in everyday life. As a result of reading, you will not only strengthen your knowledge, but also open new horizons in understanding the world around you. If you are looking for a high-quality, structured and understandable collection of problems in thermodynamics and molecular physics, then the “Complex of problems in the general course of physics” Book II" is exactly what you need.