1.

`1 mol` of `NH_(3)` gas at `27^(@)C` is expanded under adiabatic condition to make volume `8` times `(gamma=1.33)`. Final temperature and work done, respectively, areA. `150 K, 900 cal`B. `150 K, 400 cal`C. `250 K, 1000 cal`D. `200 K, 800 cal`

Answer» Correct Answer - A
`T_2 = T_1 ((V_1)/(V_2))^(gamma -1) = 150 K`
`w = -C_V Delta T = - C_V(T_2 -T_1)`
=`-3 xx 2 xx (150 - 300) = 900 cal`.


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