Consider three independent hypothetical processes carried out in an isolated system…

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Consider three independent hypothetical processes carried out in an isolated system at constant temperature: Process I: ΔSsys=+25 J K−1\Delta S_{\text{sys}} = +25\,\text{J K}^{-1}, ΔSsurr=−5 J K−1\Delta S_{\text{surr}} = -5\,\text{J K}^{-1} Process II: ΔSsys=−15 J K−1\Delta S_{\text{sys}} = -15\,\text{J K}^{-1}, ΔSsurr=+10 J K−1\Delta S_{\text{surr}} = +10\,\text{J K}^{-1} Process III: ΔSsys=−8 J K−1\Delta S_{\text{sys}} = -8\,\text{J K}^{-1}, ΔSsurr=+8 J K−1\Delta S_{\text{surr}} = +8\,\text{J K}^{-1} Which option lists all processes that are thermodynamically allowed (either spontaneous or reversible)? (a) Only I (b) Only III (c) I and III (d) I, II and III

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