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An expansion process on a monotomic ideal gas ( Cv= 3/2 R), has a linear path...

An expansion process on a monotomic ideal gas ( Cv= 3/2 R), has a linear path between the initial and final coodinates on a pV diagram. The coordinates of the initial state are: the pressure is 300 kPa, the volume is 0.07 m^3, and the temperature is 390 K. The final pressure is 130 kPa and the final temperature is 310 K. The work done by the gas, in SI units, is closest to:
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