$$\require{cancel}$$

Thermodynamics is a subject that has a wide variety of applications, including many in practical and engineering contexts.

• ## 3: Temperature

During our studies of heat and thermodynamics, we shall come across a number of simple, easy-tounderstand terms such as entropy, enthalpy, Gibbs free energy, chemical potential and fugacity, and we expect to have no difficulty with these. There is, however, one concept that is really quite difficult to grasp, and that is temperature. We shall do our best to understand it in this chapter.