2. CHE 205

3. $200 $400 $600 $800 $1000 Stoichiometry Reactive Systems Flowcharts and DOF BalancesEmpty $600 $1000

4. Balance the following equation C 7 H 8 O + O 2 CO 2 + H 2 O

5. What is the fractional conversion if 50 lb m of propane are fed to a reactor and 15 lb m are in the product

6. What is the equilibrium constant expression for the reaction: C 2 H 4 (aq) + Cl 2 (aq) C 2 H 4 Cl 2 (aq)

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

8. Write all of the atomic balances for the following flow sheet 100 moles 0.25 mol C 3 H 6 /mol 0.10 mol NH 3 /mol 0.65 mol air/mol n 1 mol C 3 H 6 n 2 mol NH 3 n 3 mol O 2 n 4 mol N 2 n 5 mol C 3 H 3 N n 6 mol H 2 O

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

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

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

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

13. Given the following flow sheet, what is the overall conversion ReactorSeparator 60 mol A 150 mol A 50 mol B 200 mol A A B

14. What is missing from the following flowchart? 100 kg 0.3 kg A/kg 0.7 kg B/kg m 1 (kg) 0.2 kg B/kg 0.8 kg C/kg x 1 kg A/kg x 2 kg B/kg

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

16. Determine the number of Degrees of Freedom in the following system 35 lb m x 1 lb m A/lb m (1-x 1 ) lb m B/lb m m 1 (lb m ) 20 lb m 0.45 lb m A/lb m 0.55 lb m B/lb m 0.85 lb m A/lb m 0.15 lb m B/lb m

17. Determine the number of Degrees of Freedom in the overall system 50 kg A/s m o kg /s 0.4 kg B/kg 0.6 kg C/kg x 1 kg A/kg (1-x 1 ) kg B/kg 0.2 kg A/kg 0.8 kg C/kg 0.7 kg A/kg 0.3 kg B/kg m 1 kg /s m 3 kg /s m 4 kg /s m 2 kg /s x 2 kg A/kg x 3 kg B/kg (1-x 2 -x 3 ) kg C/kg

19. What is the number of Degrees of Freedom in the first separator for the following system? 5000 g m 1 (g) m 2 (g) m 4 (g) 3500 g m 3 (g) 0.25 g A/g 0.35 g B/g 0.40 g C/g 0.45 g B/g 0.55 g C/g 0.60 g A/g 0.25 g B/g 0.15 g C/g x 1 g A/g (1-x 1 ) g B/g x 2 g A/g (1-x 2 ) g B/g x 3 g A/g (1-x 3 ) g B/g

20. How many balances are independent in the following system? 100 kg 0.3 kg A/kg 0.7 kg B/kg m 1 (kg) 0.2 kg B/kg 0.8 kg C/kg x 1 kg A/kg x 2 kg B/kg (1-x 1 -x 2 ) kg C/kg m 2 (kg)

21. Please write the balance on B in the following system: 100 kg 0.3 kg A/kg 0.7 kg B/kg m 1 (kg) 0.2 kg B/kg 0.8 kg C/kg x 1 kg A/kg x 2 kg B/kg (1-x 1 -x 2 ) kg C/kg m 2 (kg)

22. What is the mathematical expression that represents the following statement: the feed ratio of A to B is 2:1? m A (kg) m B (kg) m 1 (kg) x 1 kg A/kg (1-x 1 ) kg B/kg

24. Write the mathematical expression that represents the statement – 70% of the water is stripped from the feed solution and sent to a processing plant m o (kg) m 1 (kg H 2 O) m 2 (kg) x 2 kg A/kg (1-x 2 ) kg H 2 O/kg x 1 kg A/kg (1-x 1 ) kg H 2 O/kg To processing plant

25. What is the total molar amount of the overhead product (m O ) if 93% of A is recovered in this stream? 200 mol m B (mol) m O (mol) 0.95 mol A/mol 0.05 mol B/mol 0.5 mol A/mol 0.5 mol B/mol x 1 mol A/mol (1-x 1 ) mol B/mol

26. Answers:Stoichiometry 200: C 7 H 8 O+(17/2)O 2 400: 0.7 mol reacted/mol fed 600:K=y C2H4Cl2 /(y C2H4 y Cl2 ) 800:38.01 mol Air/mol C 3 H 8 1000: C:25=n 1 +n 5 H:180=6n 1 +3n 2 +3n 5 +2n 6 N:112.7=6n 1 +3n2+3n 5 +2n 6 O:27.3=2n 3 +n 6 7CO 2 +4H 2 O

27. Answers:Reactive Systems 200: 0.25 400: Xi 1 =80 mols, Xi 2 =10 mols 600:0.8 800:16 mol B formed/mol C formed 1000: 0.833 mol reacted/ mol fed

28. 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

29. Answers: Balances 200: 3 400: 70+0.2m 1 =m 2 x 2 600:m A =2m B 800:0.7m 0 (1-x 1 )=m 1 1000: 97.90 mol