Elementary Principles 271

# Elementary Principles 271 - 7.48 I H 2 O(v 760 mm Hg 100C H...

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7-26 7.48 H O( ) v T 0 I 2 760 mm Hg 100°C H O( ), 100 °C l 2 H O( ) v T f II 2 (760 + 50.1) mm Hg H O( ), l 2 T f T f 1.08 bar sat'd T f = 101.8°C (Table 8.5) Energy balance - closed system: ΔΔ EE W Q pK ,, , = 0 Δ U m Um U m U m U vv l I lb bv v l l b b v l b == + + 0 II II I II II II I I I I I I -vapor -liquid -block ±±± ± ± ± II I V V U U l v l v 101 108 1044 1046 1673 1576 419 0 426 6 25065 2508 6 .. ± ± ± ± bar, 100 C bar, 101.8 C Lkg °° bg b g Initial vapor volume: 20.0 L L kg 1 L 8.92 kg L H O I 2 Vv v =− = 50 50 14 4 Initial vapor mass: = 14.4 L 1673 L kg kg H O I 2 mv v b g 861 10 3 . Initial liquid mass: 5 L 1.044 L kg kg H O I 2 ml l 04 7 9 b g Final energy of bar: .36 101.8 kJ kg II ± . U b 03 6 6 Assume negligible change in volume & liquid ⇒= V v II L 14 4 Final vapor mass: 14.4 L 1576 L kg kg H O II 2 v × b g 914 10 3 Initial energy of the bar: ±
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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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