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Split_00012 - 8.30(cont'd References H2O(l 25oC Air(v 25oC...

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8- 12 Re ferences: H 2 O (l, 25 o C), Air (v, 25 o C) substances ± n in (mol / s) ² H in (kJ / mol) ± n out (mol / s) ² H out (kJ / mol) dry air 25.2 14.37 25.2 C dT p air T d i 25 z H 2 O(v) 1.0 C dT H C dT p H O l vap p H O v d i d i 2 2 25 100 100 500 ( ) ( ) ² z z + 7.1 C dT H C dT p H O l vap p H O v T d i d i 2 2 25 100 100 ( ) ( ) ² z z + H 2 O(l) 6.1 0 -- -- Δ H n H n H C dT C dT H C dT C dT H C dT out out in in p air T p H O l vap p H O v T p H O l vap p H O v = = F H G I K J + + + F H G I K J + + F H G I K J = z z z z z 0 252 71 252 14 37 100 0 25 25 100 100 25 100 100 500 2 2 2 2 ± ² ± ² . . ² . . . ² ( ) ( ) ( ) ( ) b g d i b g d i d i b gb g b g d i d i Integrate, solve : T = 139 o C b. ( ) ( ) ( ) ( ) 2 139 139 ( ) 500 500 25.2 1.00 290 kW p p air H O v Q C dT
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