Chemistry - Thermodynamics - II Question with Solution | TestHub

The system goes 1 to 2 reversibly and returns 2 to 1 irreversibly. (a) Entropy change along the reversible path is ∫ δ q_rev/T: true. (b) For the irreversible path the Clausius inequality gives S₁ - S₂ > ∫₂¹ δ q_irr/T, not equality: false. (c) ∮ δ q/T < 0 for an irreversible cycle, so the sum is not zero: false. (d) Δ S_cycle = 0 for the state function, and ∮ δ q/T < 0: true. Ans: (a), (d).