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Thermodynamics
Question
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Classify the following processes as reversible or irreversible:
(i) mixing of two gases by diffusion.
(ii) dissolution of sodium chloride in water
(iii) evaporation of water at 373 K at 1 atm pressure
(iv) expansion of a gas in vacuum.

Answer

(i) Irreversible
(ii) Irreversible.
(ii) Reversible  
(iv) Irreversible.

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