Question

A system is designed to store acetonitrile safely at high pressures and temperatures. Acetonitrile is contained in a 0.2 ft3 tank that is maintained at 4500 psia and 550 ° F. This tank is placed inside a second tank whose volume, excluding the first one, is 2 ft3. The second tank is filled with nitrogen at 10.0 atm and 550 ° F. Use the compressibility graph to estimate the final system pressure (atm) in case the first tank ruptures and the final system temperature is 550 ° F. The critical temperature and pressure of acetonitrile are 548 K and 47.7 atm, respectively.

Answer 1

Solution: Ny! To =126.25227:16°R Р. - 33.5 atm ) cu tonitrile To 5548K - 986.4 OR > Pe=47.7 atm Tank ų (autonitrile) : T: 550 ° F P, = 4500 Psia 9 Te = 102 Per 6.4 - > ! Zi=0.80 nia Pivo ZIRT, 306 atm 0.2 of 13 1009-7°R. lb mole or 0730P fa amm 0.8 ni 0-104 lb-mole. Tank-2: (N2) Ta = 550°F op, = 10 atm Ту, - 4,4 fr = 604 Z₂ = 1 lo mole or to ng = P₂ V. Toatm 12443 1009.7 °R. Za RT, 7302 ft3 am ni = 0.027 eb-mole.

final! D-104 T! 986.4 °R ( 0-0271227.16ºR = 0.131 8 30°p. T = 550°C Ti': 1.22 Pc D.104 . )*** 47.7 atm + 0.077 0131 x 33.5 atm 11 0131 44.8 atm. Yulianas = û po' RT 2.2 A3 44.8 atm I lb mole or 830 R 0.7302 ffi-am 1.24. 0.13) lb mole ''. Z 0.85. P= ZnRT 0.850.131 lb mole 1009.7°R ***** 730 ft3 atm eb-mde or 2.2 ft3 p= 37-3 atm
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