Pure water is used to dilute 152 lbm of a sulfuric acid stream that has an initial mass fraction of H2SO4 equal to 0.85 in order to produce a diluted acid with an H504 mass fraction of 0.45. The temperature of the water is 40 F and that of the concentrated acid is 77F. An enthalpy-composition diagram for the system is shown below. (Btu/lb solution) 140 120 100 80 60 40 20 -20 -40 -60 -80 -100 -120 -140 60 40 32F 200F 80 Freezing line 0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 Mass fraction of HSO4 Enthalpy-concentration chart for H2504-H2O. (Redrawn from the data of W. D. Ross, Chem. Eng. Progr., 43:314, 1952.) Adiabatic Temperature Determine the final temperature of the mixture if the process occurs adiabatically. T= i eTextbook and Media