From motor to entropy: connecting formulations of the second thermodynamic principle through Johnstone's Triangle
The Second Thermodynamic Principle is conceptually complex and historically multifaceted, making it a challenge in science education. This paper employs Johnstone's Triangle—a model distinguishing macroscopic, microscopic, and symbolic levels of representation—as a pedagogical framework to relate the three foundational interpretations of the Second Principle: Carnot's macroscopic efficiency limits, Boltzmann's statistical...