An ideal gas at pressure, volume, and temperature, P 0 , V 0 , and T 0 , respect

Question

An ideal gas at pressure, volume, and temperature, P0, V0, and T0, respectively, is heated from point A to point B, allowed to expand to point C (at the same temperature as point B, 2T0), and then returned to the original condition, point A. The internal energy decreases by 3 P0V0/2 going from point C to point A. In going around this cycle once, which quantity equals zero?

A. the net change in internal energy of the gas
B. the net work done by the gas
C. the net heat added to the gas
D. All three of the above are zero.

Explanation / Answer

D. All three of the above are zero.

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