In adiabatic process:
Correct answer: D. All of these
- A. W=−Δ(U)
- B. Entropy of system remains the same
- C. Δ(Q)=0
- D. All of these
Explanation
In an adiabatic process, no heat exchange (Δ(Q)=0) occurs between the system and its surroundings (Q=0). As a result, the change in internal energy is solely due to the work done on or by the system (W=−Δ(U)). Also, the entropy of the system remains constant (ΔS=0).
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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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