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1:58 Pn 0.00 Vo $4G KB/S LTE +91 70071 35631 Today, 12:18 pm Chap. 11 Problems 333 Then determine the number of independent equations for the overall system composed of the two columns together by listing the duplicate variables (by symbols) and unused specifications as well as the redundant equations, and appropriately adding or subtracting them from the values found in the first paragraph above. Deter- mine the degrees of freedom for the overal system. Check you results obtained in paragraph 2 above by repeating the entire analy- sis of independent equations, unknowns, and degrees of freedom for the overall sys- tem. Do they agree? They should. Do not solve any of the equations in this problem. *11.7 Examine Figure P11.7 provided through the courtsey of Professor Mike Cutlip. a. Calculate the molar flow rate of D,, D2, B¡ and B2. b. Reduce the feed flow rate for each one of the compounds by 1% in turn. Calcu- late the flow rates of D,, Dz, B, and B2 again. Do you notice something unusual? Explain your results. 7% Xylene 4% Siyrene 54% Toluene 35% Benzone D1 18% Xylene 24% Styrene 42% Toluene 16% Benzene B1 15% Xylene 25% Siyrene 40% Toluene 15% Xylene 10% Styrene 54% Toluene 21% Banzene 20% Benzene D2 F= 70 movmin 24% Xylene 65% Siyrene 10% Toluene 2% Benzene B2 Figure P11.7 *11.8 Figure P11.8 shows a schematic for making fresh water from sea water by freezing. The pre-chilled sea water is sprayed into a vacuum at a low pressure. The cooling re- quired to freeze some of the feed sea water comes from evaporation of a fraction of Solve and submit in folder 19/01/22 ||

1:58 Pn 0.00 Vo $4G KB/S LTE +91 70071 35631 Today, 12:18 pm Chap. 11 Problems 333 Then determine the number of independent equations for the overall system composed of the two columns together by listing the duplicate variables (by symbols) and unused specifications as well as the redundant equations, and appropriately adding or subtracting them from the values found in the first paragraph above. Deter- mine the degrees of freedom for the overal system. Check you results obtained in paragraph 2 above by repeating the entire analy- sis of independent equations, unknowns, and degrees of freedom for the overall sys- tem. Do they agree? They should. Do not solve any of the equations in this problem. *11.7 Examine Figure P11.7 provided through the courtsey of Professor Mike Cutlip. a. Calculate the molar flow rate of D,, D2, B¡ and B2. b. Reduce the feed flow rate for each one of the compounds by 1% in turn. Calcu- late the flow rates of D,, Dz, B, and B2 again. Do you notice something unusual? Explain your results. 7% Xylene 4% Siyrene 54% Toluene 35% Benzone D1 18% Xylene 24% Styrene 42% Toluene 16% Benzene B1 15% Xylene 25% Siyrene 40% Toluene 15% Xylene 10% Styrene 54% Toluene 21% Banzene 20% Benzene D2 F= 70 movmin 24% Xylene 65% Siyrene 10% Toluene 2% Benzene B2 Figure P11.7 *11.8 Figure P11.8 shows a schematic for making fresh water from sea water by freezing. The pre-chilled sea water is sprayed into a vacuum at a low pressure. The cooling re- quired to freeze some of the feed sea water comes from evaporation of a fraction of Solve and submit in folder 19/01/22 ||

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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1:58 Pn 0.00 Vo $4G KB/S LTE +91 70071 35631 Today, 12:18 pm Chap. 11 Problems 333 Then determine the number of independent equations for the overall system composed of the two columns together by listing the duplicate variables (by symbols) and unused specifications as well as the redundant equations, and appropriately adding or subtracting them from the values found in the first paragraph above. Deter- mine the degrees of freedom for the overal system. Check you results obtained in paragraph 2 above by repeating the entire analy- sis of independent equations, unknowns, and degrees of freedom for the overall sys- tem. Do they agree? They should. Do not solve any of the equations in this problem. *11.7 Examine Figure P11.7 provided through the courtsey of Professor Mike Cutlip. a. Calculate the molar flow rate of D,, D2, B¡ and B2. b. Reduce the feed flow rate for each one of the compounds by 1% in turn. Calcu- late the flow rates of D,, Dz, B, and B2 again. Do you notice something unusual? Explain your results. 7% Xylene 4% Siyrene 54% Toluene 35% Benzone D1 18% Xylene 24% Styrene 42% Toluene 16% Benzene B1 15% Xylene 25% Siyrene 40% Toluene 15% Xylene 10% Styrene 54% Toluene 21% Banzene 20% Benzene D2 F= 70 movmin 24% Xylene 65% Siyrene 10% Toluene 2% Benzene B2 Figure P11.7 *11.8 Figure P11.8 shows a schematic for making fresh water from sea water by freezing. The pre-chilled sea water is sprayed into a vacuum at a low pressure. The cooling re- quired to freeze some of the feed sea water comes from evaporation of a fraction of Solve and submit in folder 19/01/22 ||
Transcribed Image Text:1:58 Pn 0.00 Vo $4G KB/S LTE +91 70071 35631 Today, 12:18 pm Chap. 11 Problems 333 Then determine the number of independent equations for the overall system composed of the two columns together by listing the duplicate variables (by symbols) and unused specifications as well as the redundant equations, and appropriately adding or subtracting them from the values found in the first paragraph above. Deter- mine the degrees of freedom for the overal system. Check you results obtained in paragraph 2 above by repeating the entire analy- sis of independent equations, unknowns, and degrees of freedom for the overall sys- tem. Do they agree? They should. Do not solve any of the equations in this problem. *11.7 Examine Figure P11.7 provided through the courtsey of Professor Mike Cutlip. a. Calculate the molar flow rate of D,, D2, B¡ and B2. b. Reduce the feed flow rate for each one of the compounds by 1% in turn. Calcu- late the flow rates of D,, Dz, B, and B2 again. Do you notice something unusual? Explain your results. 7% Xylene 4% Siyrene 54% Toluene 35% Benzone D1 18% Xylene 24% Styrene 42% Toluene 16% Benzene B1 15% Xylene 25% Siyrene 40% Toluene 15% Xylene 10% Styrene 54% Toluene 21% Banzene 20% Benzene D2 F= 70 movmin 24% Xylene 65% Siyrene 10% Toluene 2% Benzene B2 Figure P11.7 *11.8 Figure P11.8 shows a schematic for making fresh water from sea water by freezing. The pre-chilled sea water is sprayed into a vacuum at a low pressure. The cooling re- quired to freeze some of the feed sea water comes from evaporation of a fraction of Solve and submit in folder 19/01/22 ||
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