The course opens with a review of classical thermodynamics and continues with an examination of the fundamental concepts of probability, statistics, and distribution functions. These topics are followed by in-depth discussion of the concepts of energy, energy quantization, and the application of these concepts to the modeling of macroscopic systems. The remainder of the course is a study of statistical mechanics and its application to a variety of classical and quantum systems. Topics covered include statistical thermodynamics, Maxwellian distributions, imperfect gases, equipartition theorem, quantum statistics, heat capacities of solids, electromagnetic radiation, and ideal quantum gases. (PHYS 0202 and PHYS 0212) 3 hrs. lect.