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Which one has lower final temperature for an adiabatic process, reversible or irreversible, when expanding to...

Which one has lower final temperature for an adiabatic process, reversible or irreversible, when expanding to the same final volume for an ideal gas?

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Answer #1

Since, In case of reversible adiabatic expansion of the ideal gas there will be maximum amount of work done because of no heat loss in extra forces like friction etc. So, the final temperature will be more in case of reversible adiabatic expansion of the ideal gas. On the other hand in case of irreversible adiabatic expansion of the ideal gas there will be heat loss in the extra forces like friction etc. So, the temperature will be less in case of irreversible adiabatic expansion of the ideal gas.

Then the irreversible adiabatic expansion of the ideal gas will have the lower temperature than the reversible adiabatic expansion of the ideal gas.

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