Split_00032 - 8.57 (contd) b g b g b C 3 H 6 O v , 329 K C...

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8- 32 8.57 (cont’d) C H O KC H O H O K K kJ kg kg kJ hk g kJ h 36 vll HH C d T QH n H vp l c ,,, ±± .. . ²² ² ± . . 329 329 303 329 520 6 2 3 26 580 4 2 6831 580 4 793 10 329 303 6 bg b g b g b g →→ =− + + == = ×− × z ΔΔ c. Overall process energy balance Reference states : A( l ), B( l ), C( l ) at 348 K (All ± H m = 0 ) Substance ² n in ± H in ² n out ± H out A l ,303 K A l ,398 K B l C l 0 0 0 0 6831 69 4050 4050 –103.5 115.0 109.0 113 ² n in kg/h ± H in kJ/kg Acetic anhydride ( l ): C p ≈×+ ×+ × ⋅° =⋅ ° 41 2 61 8 32 5 23 J1 m o l 1 0 g 1 k J mol C 102.1 g 1 kg 10 J kJ kg C 3 3 . ± HT C T p b g 348 (all substances) ²²² ² ² ± ² ± ² ± . Q H Q Q nH Q Q c r ii r c =⇒ + = = + = ×+× A × Δ out in out kJ h kJ h 200 10 0 813 10 65 6 ej (We have neglected heat losses from the still.) d. HO 2 (saturated at 11 bars): Δ ± H v = 1999 kJ kg (Table 8.6) ² ² ± ² . Qn H n rv = × = 22 kJ h kJ kg kg steam h Δ 813 10 1999 4070 6 8.58 Basis : 5000 kg seawater/h a. S = Salt 0.945 H O( ) 0.965 H O( )
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This note was uploaded on 01/07/2012 for the course CH E 210 at Penn State.

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