A mass of 500 lb_m of 40 wt% sulfuric acid solution at 140°F is diluted with 200 lb_m of pure water at 100°F. What is the concentration of the resulting solution? What is the heat effect (liberated or absorbed) of this mixing (report an extensive number) if the mixing is done such that the resulting solution is at 100°F? If the mixing was done adiabatically, what would be the resulting solution temperature? Use Figure P9-22.

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H (Btu)/(lb) solution 140 120 100 80 60 40 20 O -20 -40 -60 -80 -100 -120 -140 200 (F) 180- 160 KAN ng line 0 10 20 30 40 50 60 70 80 90 100 Wt.% H₂SO4 FIGURE P9-22 Solution specific enthalpy of the sulfuric acid + water system at various temperatures. Based on Smith, Van Ness, Abbott "introduction to Chemical Engineering Thermodynamics" 7th Edition, McGraw-Hill (Figure 12.17: Page 462).