Elementary Principles 177 - * * 6.21 a. Antoine equation...

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6- 11 6.21 a. Antoine equation pp p tol tol tol ** (( . 85 29 44 oo F) = C) = 35.63 mmHg = Mole fraction of toluene in gas: y p P tol == = 3563 0 0469 . . mmHg 760 mmHg lb - mole toluene / lb - mole Toluene displaced yn yPV RT total = + = 0.0469 lb - mole tol 1 atm gal 1 ft 92.13 lb tol lb - mole 0.7302 R 7.481 gal lb - mole .31 lb toluene displaced 3 m o m ft atm lb - mole R 3 o 900 85 460 1 () b. 90% condensation ⇒= = nl L 0 90 0 0469 1 00422 .( . ) ( ) . ( ) mol C H mol C H 78 Mole balance: 1 0 0422 09578 =+ = nn VV .. m o l Toluene balance: 00469 1 0 9578 0 0422 0 004907 ) ( .) . . / = + = yy mol C H mol Raoult’s law: py P p T tol tol × = (. ) ( ) . ( ) * 0004907 5 760 18 65 mmHg = Antoine equation: * 10 10 * 10 10 ( log ) 1346.773 219.693(6.95805 log 18.65) 17.11 C=62.8 F 6.95805 log 18.65 log BCA p T Ap −− = 6.22 a. Molar flow rate: = m kmol K 2 atm
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