Elementary Principles 266 - 7.41 Basis: (a) 510 m 3 273 K...

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7-21 7.41 Basis: 510 m 273 K L 1 mol 1 kmol min 291 K m 22.4 L STP 10 mol kmol min 3 33 10 214 3 bg = . (a) 38°C, ( mol H O/ mol ) 2 18°C, sat'd y (mol dry air/mol ) (1 –y 0 ) 21.4 kmol /min (mol dry air) n 0 ( kmol /min) h r = 97% 0 ( kmol H O( )/ mol ) 2 n 2 l 18°C y (1 – ) 1 1 y ( mol H O/ mol ) 2 . . ( ) ( ) 2 HO 2 38 C 0.97 49.692 mm Hg Inlet condition: 0.0634 mol H O mol 760 mm Hg r o hP y P ° == = ( ) 2 12 18 C 15.477 mm Hg Outlet condition: 0.0204 mol H O mol 760 mm Hg P y P ° = Dry air balance: kmol min 1 0 0634 1 0 0204 214 22 4 −= = . ± .. ± . nn oo Water balance: 0.98 kmol min kmol kg kmol 18 kg / min H O condenses 2 0 0634 22 4 0 0204 214 098 1802 22 ± ± min =+ ⇒= = (b). Enthaphies: C kJ mol air ² H 38 0 0291 38 25 03783 °= − = b g ² H air C k J m o l 18 0 0291 18 25 0204 b g ² , . . ² , . . ² ,. Hv Hl 3 3 3 2 2 2 38 C kJ 1 kg 18.02 g kg 10 g mol kJ mol 18 C kJ 1 kg 18.02 g mol kJ mol 18 C 1 kg 18.02 g
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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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