Adiabatic Process
For adiabatic compression of ideal gas, which remains constant?
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About This Question
- Subject
- physics
- Chapter
- thermodynamics
- Topic
- adiabatic process
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Heat exchange
- Definition: An adiabatic process is one in which there is no heat exchange between the system and its surroundings (Q=0).
- Governing Equation: For a reversible adiabatic process, PVγ=constant (where γ=Cp/Cv).
- Variables: During adiabatic compression, both pressure (P) and temperature (T) increase, while volume (V) decreases. Therefore, PV and T are NOT constant.
- Entropy: For a reversible adiabatic process, entropy is constant (isentropic). However, 'heat exchange being zero' is the fundamental defining characteristic of all adiabatic processes.
- Conclusion: Heat exchange is zero by definition.
This medium difficulty physics question is from the chapter thermodynamics, covering the topic of adiabatic process. It appeared in the 2025 exam.
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