1 mole of \( \mathrm{NH}_{3} \) gas at \( 27^{\circ} \mathrm{C} \) is expanded in reversible adi...

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1 mole of \( \mathrm{NH}_{3} \) gas at \( 27^{\circ} \mathrm{C} \) is expanded in reversible adiabatic condition to make volume 8 times \( (\gamma=1.33) \). Final temperature and work done respectively are :
(a) \( 150 \mathrm{~K}, 900 \mathrm{cal} \)
(b) \( 150 \mathrm{~K}, 400 \mathrm{cal} \)
(c) \( 250 \mathrm{~K}, 1000 \mathrm{cal} \)
(d) \( 200 \mathrm{~K}, 800 \mathrm{cal} \)
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