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CGP EDU Academic Team
Published on: August 14, 2026
An ideal gas undergoes adiabatic expansion against constant external pressure. Which of the following is incorrect :
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b,d) In adiabatic expansion, q = 0. So Δ E = W = –P ext Δ V.
Irreversible adiabatic So PV γ = constant not valid.
Since q = 0, so gas does work by utilizing its internal energy.
So, T decreases and also enthalpy (H) decreases.
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