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AP Physics 2
9.6 Entropy and the Second Law of Thermodynamics
9.4 The First Law of Thermodynamics
AdvancedMCQConceptual23.7k
P-V diagram showing reversible Cycle 1 and irreversible Cycle 2.
P-V diagram showing reversible Cycle 1 and irreversible Cycle 2.
A fixed quantity of an ideal gas is taken through two alternative closed thermodynamic cycles, Cycle 1 and Cycle 2, as shown in the pressure-versus-volume (\[P\text{–}V\]) diagram. Cycle 1 is a quasi-static rectangular path composed of reversible isobaric and isovolumetric processes, while Cycle 2 is an actual irreversible cycle operating between the same volume limits whose path is enclosed entirely within Cycle 1. Both cycles proceed in a clockwise direction. Which of the following claims is correct regarding the thermodynamic behavior of the gas and its surroundings over one complete cycle?

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