Entropy
Which of the following processes is accompanied by an increase in entropy?
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About This Question
- Subject
- chemistry
- Chapter
- chemical thermodynamics
- Topic
- entropy
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Dissolution of sugar in water
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 ΔS>0.
- Freezing (L→S), Condensation (V→L), and Deposition (V→S): All involve molecules moving from messy/disordered states to more fixed/ordered states. Disorder decreases, so ΔS<0.
This easy difficulty chemistry question is from the chapter chemical thermodynamics, covering the topic of entropy. It appeared in the 2025 exam.
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