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A piston-cylinder isolated system with R-134 at 50ºC and 1MPa with volume of 100L. R-134 expands...

A piston-cylinder isolated system with R-134 at 50ºC and 1MPa with volume of 100L. R-134 expands and piston moves to reach at internal pressure of cylinder to 100kPa. A person claims during this process R-134 has done 190kJ work on piston, is this true claim? Why?

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