Test Form 3

Test Form 3 -...

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Unformatted text preview: ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ Bonus Final Exam 3 ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ 1 Consider the following equilibrium, for which K p ¡ 1.49 ¡ 10 8 at 373 K CO ¡ g ¢ Cl 2 ¡ g ­ COCl 2 ¡ g In an equilibrium mixture of the three gages, P CO ¡ P Cl2 ¡ 8.60 ¡ 10 " 4 atm. The partial pressure of the product COCl 2 is atm. ( A ) 1.28 ¡ 10 5 atm ( B ) 1.10 ¡ 10 2 atm ( C ) 1.72 ¡ 10 11 atm ( D ) 4.96 ¡ 10 " 15 atm ( E ) 2.01 ¡ 10 14 atm 2 For a process to be spontaneous it MUST be true that... ( A ) the Gibbs free energy of the system decreases and S univ increases. ( B ) heat is transferred from the system to the surroundings. ( C ) the entropy change of the system is positive. ( D ) both the enthalpy and the entropy of the system decrease. ( E ) the entropy change of the system is zero. 3 What is the P H of a solution made by dissolving 15.1 g of acetic acid, HC 2 H 3 O 2 , in enough water to make 100 mL of solution? The K a of HC 2 H 3 O 2 is 1.8 ¡ 10 " 5 . ( A ) P H ¡ 0.61 ( B ) P H ¡ 4.72 ( C ) P H ¡ 2.17 ( D ) P H ¡ 2.71 ( E ) P H ¡ 3.70 4 Calculate the P H of a 2.16 M solution of NaF. The K a for HF is 6.8 ¡ 10 " 4 . ( A ) P H ¡ 10.83 ( B ) P H ¡ 0.33 ( C ) P H ¡ 2.16 ( D ) P H ¡ 8.75 ( E ) P H ¡ 5.24 5 The overall cell reaction for the ELECTROLYSIS shown below is: Cd 2 ¢ ¡ aq ¢ Cu ¡ s v Cd ¡ g ¢ Cu 2 ¢ ¡ aq Which of the following statements is FALSE ? ( A ) Electrons flow from the copper electrode to the cadmium electrode. ( B ) The copper electrode is the anode and the cadmium electrode is the cathode. ( C ) Cations migrate from the salt bridge into the 1.0 M Cu 2 ¢ solution. ( D ) The mass of the Cd ¡ s electrode will increase during the electrolysis. ( E ) The mass of the Cu ¡ s electrode will decrease during the electrolysis. 6 A mixture consisting of 100g of solid sodium hydroxide, 100g of solid sodium hydrogen carbonate, and 2.5 atm of carbon dioxide is placed into a sealed 1.00-L steel reaction vessel. This mixture is heated to 700 K and allowed to come to equilibrium according to the following reaction: NaOH ¡ s ¢ CO 2 ¡ g ­ NaHCO 3 ¡ s ; K p ¡ 2.5 What is the equilibrium partial pressure of carbon dioxide? ( A ) 1.9 ¡ 10 " 1 atm ( B ) 2.5 atm ( C ) 4.0 ¡ 10 " 1 atm ( D ) 3.0 ¡ 10 " 1 atm ( E ) 3.7 atm 7 The decomposition of CH 3 N 2 CH 3 , shown below, is a first-order reaction with a half life of 32.1 min at 327 ( C. Initially the concentration of CH 3 N 2 CH 3 is 8.92 ¡ 10 " 2 M. What is the concentration after 26.1 min?...
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This note was uploaded on 05/12/2011 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Test Form 3 -...

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