Answer: 4 L.
- A 1 L
- B 2 L
- C 4 L
- D 8 L
Correct answer: C. 4 L
Explanation: PV = constant. P1V1 = P2V2. 4 x 2 = 2 x V2. V2 = 4 L.
The Carnot cycle alternates two isothermal steps (heat absorbed at TH, released at TC) with two adiabatic steps (no heat exchange); the enclosed loop area equals the net work output, and η = 1−TC/TH is the maximum possible efficiency between those two temperatures.
Concept context
Laws of thermodynamics, heat engines, entropy, and gas processes.