One lb. of air is heated at constant volume from 140℉ and 50 psia to 540℉, compressed adiabatically to 200 psia, and the

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One lb. of air is heated at constant volume from
140℉ and 50 psia to
540℉, compressed
adiabatically to 200 psia, and then cooled at constant volume to
240℉. Sketch the processes
on a p-v diagram, and shade the area representing the total work.
Determine the temperature and volume at the end of adiabatic
compression. Calculate the work done, the heat added and the change
in internal energy during the adiabatic process. Assume non-flow
conditions. R = 53.3 ft.lb/lb.-R, cp = 0.24
Btu/lb.-R.