Answer: C- Two isothermal processes
The Carnot cycle consists of two adiabatic processes and two isothermal processes.
Solution:
The Carnot cycle is an ideal thermodynamic cycle with the highest thermal efficiency among all heat engines. Carnot cycle on the temperature-entropy diagram is shown below;
The Carnot cycle consists of two adiabatic processes and two isothermal processes.
- 1-2: isothermal heat addition process
- 2-3: reversible adiabatic expansion process
- 3-4: isothermal heat rejection process
- 4-1: reversible adiabatic compression process
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