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300 m mol of an ideal gas occupies 13.7 ...

300 m mol of an ideal gas occupies `13.7 dm^3 at 300 K`. Calculate the work done when the gas is expanded until its volume has increased by `2.3 dm^3` (a) isothermally against a constant external pressure of 0.3 bar (b) isothermally and reversibly (c) into vaccum.

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