Carnot Cycle  -  A simplified model of the cycle utilized by a heat engine to convert heat into work.

Carnot Efficiency  -  The Carnot efficiency, η_C, is the ratio of the work to the input heat: η_C≡

Carnot Inequality  -  The Carnot Inequality states that the actual efficiency of a system is at best equal to the Carnot Efficiency: η≤η_C.

Heat  -  Heat is the transfer of energy to a system via thermal contact with a reservoir.

Isentropic  -  At a constant entropy.

Isobaric  -  At a constant pressure.

Isothermal  -  At a constant temperature.

Work  -  Work is the transfer of energy to a system via a change in the parameters of the system.