An expander operates adiabatically with nitrogen entering at T\ and P\ w ith a molar flow rate n. The exhaust pressure is 15. and the expander efficiency is IJ. Estimate the power output of the expander and the temperature of the exhaust stream for one of the following sets of operating conditions.
(a) T1 = 480oC, P1 = 6 bar, n = 200 mol s-1, P2 = 1 bar. ή = 0,80.
(b) T1 = 400oC, P1 = 5 bar, n = 150 mol s-1 P2 = 1 bar, ή = 0.75,
(c) T1 = 500oC. P1 = 7 bar. n = 175 mol s-1 P2 - 1 bar. ή m 0.78.
(d) T1 = 450oC, P1 = 8 bar. n = 100 mol s-1. P2 = 2 bar, ή = 0.85.
(e) T1 = 900(oF), P1 = 95(psia). n = 0.50(lbmol)(s)-1, P2 = I5(psia). ή = 0.80.