Review-Problems-Exam-1-Ch14-16

Review-Problems-Exam-1-Ch14-16 - Some Review Problems for...

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1 Some Review Problems for Exam 1 – Chem 1B (Note: this set of problems is not comprehensive!) 1. For the reaction: 2 A (g) + B (g) A 2 B (g) , K c = 1.5 × 10 -7 Determine the equilibrium concentrations of all species after equilibrating 1.0 moles of A and 1.0 moles of A 2 B in a 2.0-L flask. 2. For the reaction: P 2 CO 2 H 6 (s) 2 PH 3 (g) + CO 2 (g) When solid P 2 CO 2 H 6 is placed into an empty flask, the total pressure at equilibrium is 0.51 atmospheres. Determine K p for this reaction. 3. For the reaction: 2 NO 2 (g) N 2 (g) + 2 O 2 (g) The system is at equilibrium when 0.80 moles of NO 2 , 0.20 moles of N 2 , and 0.60 moles of O 2 are contained in a 0.50 L flask. How many moles of N 2 must be removed from the flask to decrease the equilibrium quantity of NO 2 to 0.70 moles? 4. Given: SnO 2 (s) + 2 H 2 (g) Sn (s) + 2 H 2 O (g) K c = 8.12 H 2 (g) + CO 2 (g) H 2 O (g) + CO (g) K c = 0.771 Determine K c for the reaction: SnO 2 (s) + 2 CO (g) Sn (s) + 2 CO 2 (g) 5. Given the following mechanism: A + A B + C (fast) C + D E + F (slow) Determine the rate law. 6. Determine the rate law from the following mechanism. I - + S 2 O 8 2- IS 2 O 8 3- (slow) IS 2 O 8 3- 2 SO 4 2- + I + (fast) I + + I - I 2 (fast) I 2 + I - I 3 - (fast) 7. The following reaction is exothermic: 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) K c = 1.98 at 1030°C For questions a-c, assume the system starts at equilibrium. a. What will happen to the concentration of SO 3 if you increase the temperature? Briefly explain why. b. What will happen to the concentration of SO 3 if you decrease the total volume of the container? Briefly explain why. c. What will happen to the concentration of SO 3 if you remove SO 2 ? Briefly explain why. d. Determine the value of K p for this reaction at 1030.°. e. Which way will the reaction go (forward or reverse) to reach equilibrium if you start
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This note was uploaded on 09/04/2011 for the course CHEM 1B taught by Professor Fossum during the Spring '10 term at Laney College.

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Review-Problems-Exam-1-Ch14-16 - Some Review Problems for...

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