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AP Physics 2
9.4 The First Law of Thermodynamics
BeginnerMCQConceptual17.5k
A P-V diagram showing a cyclic process for an ideal gas. The horizontal axis represents volume V, and the vertical axis represents pressure P. State 1 is at low pressure P_1 and low volume V_1. State 2 is at high pressure P_2 and low volume V_1. State 3 is at high pressure P_2 and high volume V_2. State 4 is at low pressure P_1 and high volume V_2. The path goes vertically up from 1 to 2, horizontally right from 2 to 3, vertically down from 3 to 4, and horizontally left from 4 to 1. Direction arrows on the rectangle point clockwise.
P-V diagram for a thermodynamic cycle.
An ideal gas undergoes a cyclic thermodynamic process represented by the rectangular path \(1 \rightarrow 2 \rightarrow 3 \rightarrow 4 \rightarrow 1\) on the pressure-volume (\(P\text{-}V\)) diagram shown. Which of the following correctly describes the net work done BY the gas and the net change in internal energy of the gas during one complete cycle?

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