For spontaneous changes in an isolated system (S = entropy) ___________________?
Correct answer: C. ds > 0
- A. ds = 0
- B. ds <0
- C. ds > 0
- D. ds = Constant
Explanation
An isolated system exchanges neither heat nor work with its surroundings, so any spontaneous change must increase its entropy. Therefore, dS > 0, while dS = 0 applies to equilibrium or a reversible limiting change.
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