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A sample of argon of mass 6.56 g occupies 18.5 dm3 at 305 K.

(a) Calculate the work done when the gas expands isothermally against a constant external pressure of7.7 kPa until its volume has increased by 2.5 dm3.

(b) Calculate the work that would be done if the same expansion occurred reversibly.

(a) Calculate the work done when the gas expands isothermally against a constant external pressure of7.7 kPa until its volume has increased by 2.5 dm3.

(b) Calculate the work that would be done if the same expansion occurred reversibly.

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