During adiabatic compression work done is equal to 200 J. What will be the change in internal energy?
Correct answer: B. +200 J
- A. -200 J
- B. +200 J
- C. 100 J
- D. 0 J
Explanation
In an adiabatic system no heat exchange between the system and surrounding. In adiabatic compression work done by the system is negative so the change in internal energy will be positive. Or -W=U Since work done by the system is -200 J The change in internal energy will be +200 J
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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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