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CHE 205

CHE 205. Stoichiometry. Reactive Systems. Flowcharts and DOF. Balances. Empty. $200. $200. $200. $200. $200. $400. $400. $400. $400. $400. $600. $600. $600. $600. $600. $800. $800. $800. $800. $800. $1000. $1000. $1000. $1000. $1000. Balance the following equation

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CHE 205

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  1. CHE 205

  2. Stoichiometry Reactive Systems Flowcharts and DOF Balances Empty $200 $200 $200 $200 $200 $400 $400 $400 $400 $400 $600 $600 $600 $600 $600 $800 $800 $800 $800 $800 $1000 $1000 $1000 $1000 $1000

  3. Balance the following equation C7H8O + O2 CO2 + H2O

  4. What is the fractional conversion if 50 lbm of propane are fed to a reactor and 15 lbm are in the product

  5. What is the equilibrium constant expression for the reaction: C2H4 (aq) + Cl2 (aq) C2H4Cl2 (aq)

  6. How much air is needed per mole of propane if propane is completely combusted in the presence of 60% excess air

  7. Write all of the atomic balances for the following flow sheet 100 moles 0.25 mol C3H6/mol 0.10 mol NH3/mol 0.65 mol air/mol n1 mol C3H6 n2 mol NH3 n3 mol O2 n4 mol N2 n5 mol C3H3N n6 mol H2O

  8. Given the following flow sheet, what is the single-pass conversion 200 mol A 60 mol A 150 mol A 50 mol B Reactor Separator A B

  9. Given the following flow sheet, what is the yield of B 10 moles A 160 moles B 10 moles C 100 moles A Reactor A 2B (desired) A C (undesired)

  10. Given the following flow sheet, what is the selectivity of B relative to C 10 moles A 160 moles B 10 moles C 100 moles A Reactor A 2B (desired) A C (undesired)

  11. Given the following flow sheet, write out all of the extent of reaction equations and solve 10 moles A 160 moles B 10 moles C 100 moles A Reactor A 2B (desired) A C (undesired)

  12. Given the following flow sheet, what is the overall conversion 200 mol A 60 mol A 150 mol A 50 mol B Reactor Separator A B

  13. What is missing from the following flowchart? 100 kg 0.3 kg A/kg 0.7 kg B/kg x1 kg A/kg x2 kg B/kg 0.2 kg B/kg 0.8 kg C/kg m1 (kg)

  14. Complete the following flowchart using only variables (do not solve) 50 kg A/s 0.6 kg A/kg 0.4 kg B/kg 75 kg /s 0.4 kg B/kg 0.6 kg C/kg 0.7 kg A/kg 0.3 kg B/kg 0.2 kg A/kg 0.8 kg C/kg

  15. Determine the number of Degrees of Freedom in the following system 35 lbm m1 (lbm) 0.45 lbm A/lbm 0.55 lbm B/lbm x1lbm A/lbm (1-x1) lbm B/lbm 20 lbm 0.85 lbm A/lbm 0.15 lbm B/lbm

  16. Determine the number of Degrees of Freedom in the overall system m1 kg /s 50 kg A/s x1 kg A/kg (1-x1) kg B/kg m3 kg /s mo kg /s 0.4 kg B/kg 0.6 kg C/kg 0.7 kg A/kg 0.3 kg B/kg m2 kg /s x2 kg A/kg x3 kg B/kg (1-x2-x3) kg C/kg m4 kg /s 0.2 kg A/kg 0.8 kg C/kg

  17. DAILY DOUBLE

  18. What is the number of Degrees of Freedom in the first separator for the following system? 5000 g m1 (g) m3 (g) 0.25 g A/g 0.35 g B/g 0.40 g C/g 0.60 g A/g 0.25 g B/g 0.15 g C/g x1 g A/g (1-x1) g B/g x2 g A/g (1-x2) g B/g m4 (g) m2 (g) 3500 g 0.45 g B/g 0.55 g C/g x3 g A/g (1-x3) g B/g

  19. How many balances are independent in the following system? 100 kg m2 (kg) x1 kg A/kg x2 kg B/kg (1-x1-x2) kg C/kg 0.3 kg A/kg 0.7 kg B/kg 0.2 kg B/kg 0.8 kg C/kg m1 (kg)

  20. Please write the balance on B in the following system: 100 kg m2 (kg) x1 kg A/kg x2 kg B/kg (1-x1-x2) kg C/kg 0.3 kg A/kg 0.7 kg B/kg 0.2 kg B/kg 0.8 kg C/kg m1 (kg)

  21. What is the mathematical expression that represents the following statement: the feed ratio of A to B is 2:1? m1 (kg) mA (kg) x1 kg A/kg (1-x1) kg B/kg mB (kg)

  22. DAILY DOUBLE

  23. Write the mathematical expression that represents the statement – 70% of the water is stripped from the feed solution and sent to a processing plant m2 (kg) mo (kg) x2 kg A/kg (1-x2) kg H2O/kg x1 kg A/kg (1-x1) kg H2O/kg m1 (kg H2O) To processing plant

  24. What is the total molar amount of the overhead product (mO) if 93% of A is recovered in this stream? mO (mol) 200 mol 0.95 mol A/mol 0.05 mol B/mol 0.5 mol A/mol 0.5 mol B/mol mB (mol) x1 mol A/mol (1-x1) mol B/mol

  25. Answers:Stoichiometry • 200: C7H8O+(17/2)O2 • 400: 0.7 mol reacted/mol fed • 600:K=yC2H4Cl2/(yC2H4yCl2) • 800:38.01 mol Air/mol C3H8 • 1000: C:25=n1+n5 H:180=6n1+3n2+3n5+2n6 N:112.7=6n1+3n2+3n5+2n6 O:27.3=2n3+n6 7CO2+4H2O

  26. Answers:Reactive Systems • 200: 0.25 • 400: Xi1=80 mols, Xi2=10 mols • 600:0.8 • 800:16 mol B formed/mol C formed • 1000: 0.833 mol reacted/ mol fed

  27. Answers:Flowcharts and DOF • 200: Total mass of the stream leaving • 400: Add total mass to all exit steams and label middle stream • 600:0 DOF • 800:Around whole system 1 DOF; Whole system 2 DOF • 1000: -1 DOF

  28. Answers: Balances • 200: 3 • 400: 70+0.2m1=m2x2 • 600:mA=2mB • 800:0.7m0(1-x1)=m1 • 1000: 97.90 mol

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