Carnot Cycle -- from Eric Weisstein's World of Physics

A thermodynamic cycleThermodynamic Cycles consisting of

1. Adiabatic compression from to .

2. Isothermal expansion (by placing the system in contact with a heat reservoir with temperature ).

3. Adiabatic expansion to .

4. Isothermal compression (by placing the system in contact with a heat reservoir with temperature ).

Carnot Engine, Heat Reservoir