Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A gas is allowed to expand in a well insulated container against a constant external pressure
of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy 
of the gas in joules will be
Text Solution
Verified by ExpertsThe correct answer is:
C
Work done against a constant external pressure (irreversible process).
Work done in irreversible process,
Since, the system is well insulated, 
Hence, change in internal energy, 
of the gas is -505 J.
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