Gen Chem 2

Gen Chem 2 - CHEM 072 Dr. Guenard Spring 2006 Exam 2 USE...

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CHEM 072 Exam 2 Version 11 Dr. Guenard Spring 2006 USE PENCIL ONLY!! Instructions: 1. On your answer sheet under OPITIONAL CODES, TEST CODE, write 11 and darken the circles for the number 11. 2. On your answer sheet please print your name in the space provided and fill in the appropriate circles for your name. 3. On your answer sheet, print your TUid number and fill in the appropriate circles. 4. Sign your name on the back of the answer sheet (on the line marked SIGNATURE) 5. Hand in both your answer sheet and keep this question packet. Page 1
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Spring 2006 Guenard 1. The vapor pressure of a solution containing a nonvolatile solute is directly proportional to the A) mole fraction of the solvent D) molarity of the solvent B) mole fraction of the solute E) osmotic pressure of the solute C) molality of the solvent 2. A carbonated beverage is bottled and capped in a CO 2 atmosphere in which the pressure is maintained at 3.750 atm. At this pressure, the solubility of CO 2 in the beverage is 0.65 g CO 2 /100 g. If the bottle is opened, as the gas in the space above the liquid escapes, the partial pressure of the CO 2 falls to 3.95 x 10 -4 atm. What is the solubility of CO 2 in the beverage at this new pressure? A) 5.2 x 10 - 2 g/100 g beverage D) 6.8 x 10 - 5 g/100 g beverage B) 5.0 x 10 - 4 g/100 g beverage E) 9.6 x 10 - 4 g/100 g beverage C) 6.7 x 10 - 5 g/100 g beverage 3. The reaction, 2 H 2 O( g ) + 2 Cl 2 ( g ) b 4 HCl( g ) + O 2 ( g ), has K p = 8.00 atm. The initial partial pressures of H 2 O and Cl 2 are set at 0.100 atm, while those of HCl and O 2 are set at 0.250 atm. The system is allowed to come to equilibrium. Which statement below is true? A) Q p > K p and the reaction proceeds to the right to reach equilibrium B) Q p < K p and the reaction proceeds to the left to reach equilibrium C) the reaction system is already at equilibrium D) Q p > K p and the reaction proceeds to the left to reach equilibrium E) Q p < K p and the reaction proceeds to the right to reach equilibrium 4. A chemical system is considered to have reached equilibrium when A) the frequency of collisions between the reactant molecules is equal to the frequency of collisions between the product molecules B) the sum of the concentrations of each of the reactant species is equal to the sum of the concentrations of each of the product species C) the activation energy of the forward reaction is equal to the activation energy of the reverse reaction D) the rate of production of each of the product species is equal to the rate of consumption of each of the product species by the reverse reaction E) the rate of production of each of the product species is equal to the rate of consumption of each of the reactant species Page 2
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Spring 2006 Guenard 5. The reaction, 2 NO(
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Gen Chem 2 - CHEM 072 Dr. Guenard Spring 2006 Exam 2 USE...

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