engineering physics MCQ #2793

A system undergoes a reversible adiabatic expansion. The entropy change is

engineering physics MCQ #2793

  1. Question 1

    Q1. A system undergoes a reversible adiabatic expansion. The entropy change is

    • A) Positive
    • B) Negative
    • C) Zero
    • D) Undefined

    Answer: Zero

    Explanation: In a reversible adiabatic process, ΔS = 0 because Q = 0 and the process is reversible.