InterviewSolution
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InterviewSolution
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Piston cylinder device initially contains `0.5m^(3)` of nitrogen gas at `400 kPa` and `27^(@)C`. An electric heater within the device is turned on and is allowed to apss a current of `2 A` for `5 mi n` from a `120 V` source. Nitrogen expands at constant pressure and a heat loss of `2800 J` occurs during the process. `R=25//3 kJ //k mol - K` Number of moles of nitrogen gas isA. `0.8 k mol`B. `0.08 k mol`C. `0.8 mol`D. `0.08 mol` |
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Answer» Correct Answer - B Number of moles of nitrogen gas `n=(PV)/( RT)=((40kPa)(0.5m^(3)))/(((25)/(3)kJ//k mol-K)(300K))=0.08 k mol` |
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