
doi: 10.1119/1.1969606
The heat Q2 exchanged with the high-temperature reservoir and the heat Q1 exchanged with the low-temperature reservoir identify each Carnot cycle with a single point on the heat exchange plane, the Q2−Q1 plane. The axes and the zero work line divide this plane into half-planes whose physical interpretation is described with the aid of the laws of thermodynamics.
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