This French-language textbook presents thermodynamics through concise explanations and worked examples, focusing on the use of the subject's core principles in problem solving. With 190 pages and an emphasis on exercises and solved problems, it is suited to students who need structured practice with the laws of thermodynamics, energy transformations, entropy, and related calculations. The volume functions as a study aid as well as a classroom resource, offering a practical route from theoretical concepts to applied exercises. Published by Bréal in 1988, the work reflects the conventions of French science education and is intended for readers preparing for coursework or examinations in physics and engineering-adjacent subjects.