3. The figure shows a system with a working impeller. The system is adiabatic and at constant pressure. The system contains 0.3 lbm of air at 20 psi and the temperature rises from 500 °R to 750 °R after receiving 14004 ft-lbf of work. Calculate a) total work, b) mechanical work, c) change in internal energy, and d) enthalpy change for the system.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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3. The figure shows a system with a working impeller. The system is adiabatic and at constant
pressure. The system contains 0.3 lbm of air at 20 psi and the temperature rises from 500 °R to
750 °R after receiving 14004 ft-lbf of work. Calculate a) total work, b) mechanical work, c) change
in internal energy, and d) enthalpy change for the system.
Transcribed Image Text:3. The figure shows a system with a working impeller. The system is adiabatic and at constant pressure. The system contains 0.3 lbm of air at 20 psi and the temperature rises from 500 °R to 750 °R after receiving 14004 ft-lbf of work. Calculate a) total work, b) mechanical work, c) change in internal energy, and d) enthalpy change for the system.
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