Answer: V/T = constant.
- A PV = constant
- B V/T = constant
- C P/T = constant
- D PV/T = constant
Correct answer: B. V/T = constant
Explanation: Charles law: volume is proportional to absolute temperature at constant pressure. V/T = constant.
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.