A piston-cylinder device initially contains 0.3 kg of nitrogen gas at 160 kPa and 140oC. The nitrogen is now expanded isothermally to a pressure of 100 kPa. Determine the boundary work done during this process.

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Answer:Work done by the gas is given asExplanation:As we know that the process is isothermal so here work done is given as

here we know that

now we have

so we have