A gas is enclosed in a piston-cylinder arrangement as a system. The gas is initially at a pressure of 500 kPa and occupies a volume of 0.2 m3. The gas is taken to the final state where pressure is 100 kPa through a process in which the volume of gas is inversely proportional to the pressure. The work done by the gas is
1
100 In 5 kJ
2
80 kJ
3
160 kJ
4
200 kJ
5
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