What is thermodynamics? Thermodynamics is the study of the relations between heat, work, temperature, and energy.
The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.
Thermodynamic properties are those that describe the state of a system in terms of its energy.
The four most common thermodynamic properties are enthalpy, entropy, Gibbs free energy, and internal energy.
A thermodynamic cycle consists of a linked sequence of thermodynamic processes that involve transfer of heat and work into and out of the system, while varying pressure, temperature, and other state variables within the system, and eventually return the system to its initial state.