A gas undergoes isothermal irreversible expansion at 300K from 1 lit to 10 lit against an external pressure of one atmosphere. Work done by the gas is

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A gas undergoes isothermal irreversible expansion at 300K from $1 lit to 10 lit$ against an external pressure of one atmosphere. Work done by the gas is

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$1010 KJ$

$909 J$

$5803.6 J$

$1381.8 K cals$

answer is B.

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Detailed Solution

$\begin{array}{l} W_{irr} = - P_{ext} (V_{f} - V_{i}) \\ = - 1 atm (10 l - 1 l) \\ = - 9 lit - atm \\ = - 9 (101 J) \\ = - 909 J \end{array}$

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