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Split_00072

# Split_00072 - 8.96 a 2.30 lb m 15.0 wt H 2 SO 4 77 F H1 =...

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8-72 8.96 a. 2.30 lb 15.0 wt% H SO @ 77 F H Btu / lb m (lb ) 80.0 wt% H SO @ 60 F H Btu / lb m ( lb ) 60.0 wt% H SO @ T F, H m 2 4 o 1 m 2 m 2 4 o 2 m adiabatic mixing 3 m 2 4 o 3 = − = − U V | | | W | | | ⎯⎯⎯⎯ ± ± ± 10 120 Total mass balance: 2.30 + H SO mass balance: 2.30 0.150 lb (80%) lb (60%) 2 2 4 2 m m m m m m m m = + = U V | W | = = R S | T | 3 3 2 3 0800 0 600 517 7 47 b g b g . ( . ) . . b. Adiabatic mixing = Btu / lb Figure 8.5 -1 T =140 F m o = = = − E Q H H H Δ 0 7 47 2 30 10 517 120 0 861 3 3 . ± . . ± . b g b gb g b gb g c. ± ± ± . . H Q m H H 60 wt%, 77 F Btu / lb 60 wt%, 77 F Btu o m o d i d i b gb g = − = = + = − 130 7 475 130 861 328 3 3 d. Add the concentrated solution to the dilute solution . The rate of temperature rise is much lower (isotherms are crossed at a lower rate) when moving from left to right on
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