In any spontaneous irreversible process occurring in an isolated system, how does total entropy S change?
Answer and explanation
Correct answer: B. Increases
- Step 1: The Second Law of Thermodynamics dictates the arrow of time in isolated systems. Step 2. Total entropy of an isolated system always increases in spontaneous irreversible processes: Delta S > 0. Answer: Increases. Why not the others: Decreases violates the Second Law; remains zero applies only to idealized reversible cycles; negative entropy is physically impossible.
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