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Split_00073 - 8.98 T = 140 F Fig 8.5-2 Vapor 80 NH 3 20 H 2...

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8-73 8.98 T = ° 140 F Vapor: 80% NH 20% H O Liquid: 14% NH 86% H O Fig. 8.5-2 3 2 3 2 , , Basis: 250 g system mass m m v L ( ( g vapor), g liquid) .14 .60 .80 x NH 3 B A C Mass Balance: m m v L + = 250 NH 3 Balance: 080 014 0 60 250 175 75 . . ( . )( ) m m m m g L v L g g, + = = = Vapor: m NH 3 2 3 g g NH 35 g H O = = 080 175 140 . , b gb g Liquid: m NH 3 2 3 g 64.5 g H O Liquid = = 014 75 10.5 g NH . , b gb g 8.99 Basis: 200 lb feed h m ± m v (lb h) m x v (lb m NH 3 (g)/lb m ) 200 lb m /h ² ( H v Btu lb ) m in equilibrium 0.70 lb m NH 3 (aq)/lb m at 80 o F 0.30 lb m H 2 O(l)/lb m ± m l (lb h) m ² H f = − 50 Btu lb m x l [lb m NH 3 (aq)/lb m ] ² ( H l Btu lb ) m ± ( Q Btu h) Figure 8.5-2 = Mass fraction of NH in vapor: lb NH lb 3 m 3 m x v 0 96 . Mass fraction of NH in liquid: lb NH lb 3 m 3 m x l = 0 30 . Specific enthalpies:
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