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Calculate the change in the entropies of the system and the surroundings, and the total change in entropy, when the volume of a sample of argon gas of mass 21 g at 298 k and 1.50 bar increases from 1.20 dm3 to 4.60 dm3 in
(a) an isothermal reversible expansion,
(b) an isothermal irreversible expansion against pex = 0, and
(c) an adiabatic reversible expansion.
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Calculate the change in the entropies of the system and the surroundings, and the total change in en...
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