Answer: 6.022 x 10 23.
- A 6.022 x 10<sup>23</sup>
- B 9.8 x 10<sup>23</sup>
- C 8.314
- D 1.38 x 10<sup>-23</sup>
Correct answer: A. 6.022 x 10<sup>23</sup>
Explanation: Avogadro's number N<sub>A</sub> = 6.022 x 10<sup>23</sup> mol<sup>-1</sup> (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.