Answer: 6.022 x 1023.
- A 6.022 x 1023
- B 9.8 x 1023
- C 8.314
- D 1.38 x 10-23
Correct answer: A. 6.022 x 1023
Explanation: Avogadro's number NA = 6.022 x 1023 mol-1 (particles per mole).
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.