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A `3` mole sample of a triatomic ideal gas at `300 K` is allowed to expand under adiabatic reversible condition from `5L` to `40 L`. The value of `DeltaH` isA. `-12.46 kJ`B. `-14.965 kJ`C. `-24.62 kJ`D. `-10.24 kJ` |
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Answer» Correct Answer - B For triatomic gas `gamma = 1.33, C_(P) = 4R` `T_(2) = T_(1) ((V_(1))/(V_(2)))^(gamma - 1)` `= 300 ((5)/(40))^((1)/(3))` `= 300 ((1)/(8))^((1)/(3)) = 300 xx (1)/(2) = 150` `DeltaH = n xx C_(P) (T_(2) - T_(1))` `= 3 xx 4 xx 8.314 (150 - 300)` `= - 14.965 kJ` |
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