entropy

Question

Which of the following processes is accompanied by an increase in entropy?

RankGuru · Accepted Answer

**Entropy ($S$)** is a measure of the molecular disorder or randomness of a system.
- **Dissolution of sugar**: Molecules move from a highly ordered crystal lattice into a random distribution in the liquid phase. Disorder increases, so $\Delta S > 0$.
- **Freezing** ($L 	o S$), **Condensation** ($V 	o L$), and **Deposition** ($V 	o S$): All involve molecules moving from messy/disordered states to more fixed/ordered states. Disorder decreases, so $\Delta S < 0$.

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entropy

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More entropy Practice Questions

Which process has ΔS > 0 at constant temperature?