Elementary Principles 149 - 5.54(cont'd 237 m(STP gFGH 25.3...

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5- 37 5.54 (cont’d) Process feed: 0 .0 kmol / h 25.3 kmol / h m (STP ) kmol SCMH 3 254 618 02 2 237 22 4 18 700 .. . . , +++ F H G I K J F H G I K J = bg Reactor effluent flow rate: / h kmol / h 25.3 kmol / s kmol / h 444 kmol h ) kmol mS T P h K 273.2 K kPa 4925 kPa mh std 3 actual 3 3 49.4 kmol 237 444 22 4 9946 SCMH 9950 4732 1013 354 F H G I K J = F H G I K J F H G I K J = ⇒= = ± . ± () . . / V V c. ² ± ± / . V= V n h 444 kmol / h L m kmol 1000 mol L/mol 3 3 == 354 m 1000 1 08 ² V < 20 L / mol====>ideal gas approximation is poor (5.2-36) Most obviously, the calculation of ± V from ± n using the ideal gas equation of state is likely to lead to error. In addition, the reaction equilibrium expressions are probably strictly valid only for ideal gases, so that every calculated quantity is likely to be in error. 5.55 a. PV RT B V B= RT P BB c c o1 ² ² =+ ⇒ + 1 ω From Table B.1 for ethane: T K, P atm From Table 5.3-1 = 0.098 B T K K B T K 305.4K cc o r 1 r = = =− = = 3054 48 2 0083 0 422 0 083 0 422 308 2 0 333 0139 0172 308 2 00270 11 44 . . . . . . . .
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This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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