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  4. During an adiabatic expansion of 2 mole of gas, the change in internal energy was, found - 50 J. The work done during the process:

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Q. During an adiabatic expansion of $2$ mole of gas, the change in internal energy was, found - $50 \,J$. The work done during the process:

Rajasthan PMTRajasthan PMT 2002Thermodynamics

Solution:

From Ist law of thermodynamics $d Q=d U+d W$
From adiabatic process $d Q=0$
$\therefore d W =-d U=-(-50) $
$=50\, J$