Explore the fundamental principles of heat and thermodynamics with this comprehensive textbook, meticulously crafted for undergraduate physics students following NEP 2020 guidelines. Delve into the kinetic theory of gases, the laws of thermodynamics (Zeroth, First, and Second), and advanced topics like thermodynamic potentials, Maxwell’s relations, and black body radiation theory. Written in an accessible style, this book requires only a basic understanding of calculus. Each chapter is structured for clarity with sections and subsections, simplifying complex derivations and concepts. Enhance your learning with a wealth of practice questions, including MCQs, short and long answer types, and numerical problems. Ideal for students seeking a robust understanding of heat and thermodynamics.