engineering physics MCQ #2763

In an adiabatic expansion, the temperature of an ideal gas

engineering physics MCQ #2763

  1. Question 1

    Q1. In an adiabatic expansion, the temperature of an ideal gas

    • A) Increases
    • B) Decreases
    • C) Remains constant
    • D) First increases then decreases

    Answer: Decreases

    Explanation: In adiabatic expansion, Q = 0, and W is positive, so ΔU is negative, causing temperature to decrease, as per ΔU = nCvΔT.