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What is the work done in the free expans...

What is the work done in the free expansion of an ideal gas in reversible and irreversible processes?

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In case of free expansion of an ideal gas pressure becomes zero. (into vaccum)
No workdone during free expansion of an ideal gas in case to reversible as well as irreversible process.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THERMODYNAMICS-Very Short Answer Questions
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  16. q=w=-p(ext)(v(f)-v(i)) is for irreversible…. Change.

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