Question: A closed system like that shown in Fig. P427E is operated in an adiabatic manner. First, 15,000 lbfft of work are done by this system.

A closed system like that shown in Fig. P4–27E is operated in an adiabatic manner. First, 15,000 lbf·ft of work are done by this system. Then, work is applied to the stirring device to raise the internal energy of the fluid by 10.28 Btu. Calculate the net increase in the internal energy of this system.

A closed system like that shown in Fig. P4–27E is operated in

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