Molar Heat Capacity for Graphical Pedagogy Applied to Heat Engines, Refrigerators, and Heat Pumps Driven by Chemical Change.

ABSTRACT: Instruction of thermodynamics often begins with a Carnot cycle for the pressure-volume changes of an ideal gas, yet this mechanical treatment can seem far from the minds of biologically and chemically oriented students used to liquids and solids. Herein, as an alternative, a pedagogic narrative of an experimenter, an analyst, and an innovator, all three developed around condensed-phase transitions, is used. Graphs employ heat capacity for an intuitive and visual pedagogy of enthalpy and entropy in chemical thermodynamics. Heat capacity is applied to determine the efficiencies of different types of cyclic machines for phase transitions between generalized phases A and B at high and low temperatures. The exposition thus develops the heat engine, the refrigerator, and the heat pump based on t

SUBMITTER: Martin ST 

PROVIDER: S-EPMC12641483 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature