Thermal physics

Thermal physics is the combined study of thermodynamics, statistical mechanics, and kinetic theory of gases.

This umbrella-subject is typically designed for physics students and functions to provide a general introduction to each of three core heat-related subjects.

Other authors, however, define thermal physics loosely as a summation of only thermodynamics and statistical mechanics.

[1] Thermal physics can be seen as the study of system with larger number of atom, it unites thermodynamics to statistical mechanics.

Other topics studied in thermal physics include: chemical potential, the quantum nature of an ideal gas, i.e. in terms of fermions and bosons, Bose–Einstein condensation, Gibbs free energy, Helmholtz free energy, chemical equilibrium, phase equilibrium, the equipartition theorem, entropy at absolute zero, and transport processes as mean free path, viscosity, and conduction.