Worksheet #11 ChBE 201 Winter 2008 Rev. 1 Using H-conc diagrams I have 17 M stock H2SO4 (xH2SO4 = 0.625) at 77 F and I would like to make a 1 M (xH2SO4 = 0.0981) solution, also at 77 F. How much water would I need to add to create 1 lbm of 1 M solution. (Perform Mass Balance) Perform component mass balance on H2SO4: mH2SO4,out= mH2SO4,in EMBED Equation.3 Perform total mass balance: EMBED Equation.3 Assuming ?HH2O = 45 BTU/lbm, what is the value of Q transferred to surroundings during mixing? EMBED Equation.3 SHAPE \* MERGEFORMAT What if instead I added the reactants at 77 F to a well insulated (i.e., adiabatic) system, what would the final temperature of the solution be? SHAPE \* MERGEFORMAT ~ 90 F. What if we made a similar solution (xNH3 = 0.0981) of ammonia and water @ 200 F. What would the liquid and vapor phase mass fractions of ammonia be? SHAPE \* MERGEFORMAT xNH3,liq = 0.025, xH2O,liq = 0.975 xNH3,vap = 0.2, xH2O,vap = 0.8 Given the mass fraction calculated in (d), what is the ratio of liquid to vapor in the solution? EMBED Equation.3
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