Air is contained in an insulated, rigid volume at 25oC and 180 kPa. A paddle wheel, inserted

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Air is contained in an insulated, rigid volume at 25oC and 180 kPa. A paddle wheel, inserted in the volume, does 800 kJ of work on air. If the volume is 2m3, determine.
(a) The entropy increase.
(b) Final pressure.
(c) Temperature. Use the IG model for air.
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