Ideal Gas Assumptions
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About This Question
- Subject
- physics
- Chapter
- kinetic theory of gases
- Topic
- ideal gas assumptions
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Finite molecular volume compared to container
A central assumption of the Ideal Gas model is that the molecules are 'point masses'.
- This means their actual volume is negligible (treated as zero) compared to the volume of the container.
- If the finite volume of molecules is considered (as in the van der Waals equation), the gas is no longer 'ideal'.
- Other assumptions (point particles, elastic collisions, no long-range forces) are indeed parts of the ideal gas framework.
This medium difficulty physics question is from the chapter kinetic theory of gases, covering the topic of ideal gas assumptions. It appeared in the 2025 exam.
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