Which one is not an example of adiabatic process ?
Correct answer: C. conversion of water into ice in refrigerator
- A. rapid escape of air from a burst tyre
- B. rapid expansion of air
- C. conversion of water into ice in refrigerator
- D. cloud formation in the atmosphere
Explanation
An adiabatic process involves no appreciable heat exchange, which is possible during rapid expansion, rapid air escape, and some cloud-forming processes. Water freezing in a refrigerator involves heat being removed from the water, so it is not an adiabatic process. The likely mistake is choosing d because cloud formation seems slow, although rising air can expand and cool with little heat exchange.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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