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For spontaneous changes in an isolated system (S = entropy)

This question belongs to Chemical Engineering Chemical Engineering Thermodynamics
Chemical Engineering Thermodynamics
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For spontaneous changes in an isolated system (S = entropy)

Answer & Solution
Correct Answer: Option C
By second law of thermodynamics the \[TdS \ge \delta Q\]
For an isolated system \[\delta Q = 0\]
\[ \Rightarrow \] for an irreversible (nothing but spontaneous process) \[dS > 0\]   and for an reversible (or the system at equilibrium) \[dS = 0\]
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