Second Law Statements
Mediumchemistry
Which statement correctly expresses the Second Law of Thermodynamics?
Select the correct option:
Solution
Incorrect! Answer:
Entropy of an isolated system never decreases
- Clausius/Planck Statement: Heat cannot spontaneously flow from a colder body to a hotter body.
- Entropy Interpretation: The total entropy of an isolated system (or the universe as a whole) always increases over time for any spontaneous process.
- Mathematical form: ΔStotal≥0.
- Directionality: This law defines the 'arrow of time' and explains why natural processes are irreversible.
- Comparison: Option 2 is the First Law. Option 3 is a misunderstanding of the Third Law.
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About This Question
- Subject
- chemistry
- Chapter
- chemical thermodynamics
- Topic
- second law statements
- Difficulty
- Medium
- Year
- 2025
This medium difficulty chemistry question is from the chapter chemical thermodynamics, covering the topic of second law statements. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of chemical thermodynamics concepts.
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