ABSTRACT
In thermodynamics, we are concerned with the macroscopic state of a system, which can be described by specifying its internal energy, entropy, volume, number of particles, temperature, and so on. The distinction from the statistical viewpoint is that these state variables are averages, rather than microstate values. The goal of thermodynamics is to find the relations between the state variables, and especially, find their dependence on external controls such as the temperature.
