2 mole of ideal gas at \( 27^{\circ} \mathrm{C} \) temperature is expanded reversibly from 2 lit...
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2 mole of ideal gas at \( 27^{\circ} \mathrm{C} \) temperature is expanded reversibly from 2 litre to 20 litre. Find entropy change: \( (R=2 \mathrm{cal} / \mathrm{mol} \mathrm{K}) \)
(A) \( 92.1 \)
(B) 4
(C) \( 9.2 \)
(D) undefined
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