In which of the following, the change in internal energy is more?
Correct answer: D. Change is zero in both. (both are cyclic)
- A. In system A
- B. In system B
- C. Cannot be predicted
- D. Change is zero in both. (both are cyclic)
Explanation
In a cyclic process, the system undergoes a series of changes and returns to its initial state. The change in internal energy ΔU for the entire cyclic process is zero because the internal energy is a state function, and it depends only on the initial and final states, not on the path taken.
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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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