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Unformatted text preview: Practice Exam 2 A (Zumdahl Chapters 5, 6, 7, 16p, 17) Page 1 Page 1 1. Four identical 1.0-L flasks contain the gases He, Cl 2 , CH 4 , and NH 3 , each at 0C and 1 atm pressure. For which gas do the molecules have the highest average velocity? A) He B) Cl 2 C) CH 4 D) NH 3 E) all gases the same 2. The volume of a helium balloon is 1.85 L at 24.0C and 1.00 atm at sea level. The balloon is released and floats upward. At a certain altitude, the balloon has a volume of 2.14 L and the temperature is 15.2C. What is the atmospheric pressure at this altitude? A) 0.538 atm B) 0.839 atm C) 0.891 atm D) 1.36 atm E) none of these 3. Three 1.00-L flasks at 25C and 725 torr contain the gases CH 4 (flask A), CO 2 (flask B), and C 2 H 6 (flask C). In which flask is there 0.039 mol of gas? A) flask A B) flask B C) flask C D) all E) none 4. Which of the following statements concerning equilibrium is not true? A) A system that is disturbed from an equilibrium condition responds in a manner to restore equilibrium. B) Equilibrium in molecular systems is dynamic, with two opposing processes balancing one another. C) The value of the equilibrium constant for a given reaction mixture is the same regardless of the direction from which equilibrium is attained. D) A system moves spontaneously toward a state of equilibrium. E) The equilibrium constant is independent of temperature. Practice Exam 2 A (Zumdahl Chapters 5, 6, 7, 16p, 17) Page 2 Page 2 5. For the hypothetical reactions 1 and 2, K 1 = 10 2 and K 2 = 10-4 . 1. A 2 (g) + B 2 (g) 2AB(g) 2. 2A 2 (g) + C 2 (g) 2A 2 C (g) 3. A 2 C (g) + B 2 (g) 2AB(g) + (1/2)C 2 (g) What is the value for K for reaction 3?...
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This note was uploaded on 02/15/2012 for the course CHEM 1310 taught by Professor Cox during the Spring '08 term at Georgia Institute of Technology.
- Spring '08