bonus exam final 3

# bonus exam final 3 - Bonus Final Exam 3 1 Calculate the OH...

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————————————————————————————————————— Bonus Final Exam 3 ————————————————————————————————————— 1 Calculate the OH aq concentration of a solution with a P H of 9.30. ( A ) OH 5.0 10 10 M ( B ) OH 9.3 10 1 M ( C ) OH 6.7 10 1 M ( D ) OH 2.0 10 5 M ( E ) OH 5.0 10 4 M 2 Consider the combustion of propane: C 3 H 8 g 5O 2 g 3CO 2 g 4H 2 O l Δ H 0 2220 kJ How much heat is liberated when 10.0 g of C 3 H 8 g is burned to produce products at 1 atm pressure? ( A ) 23.1 kJ ( B ) 2.22 10 4 kJ ( C ) 2.22 10 3 kJ ( D ) 13.9 kJ ( E ) 503 kJ 3 K p 6.64 10 58 for the following reaction: 3 O 2 g 2 O 3 g Which of the following are TRUE? (i) At equilibrium, P O 2 P O 3 . (ii) At equilibrium, P O 2 P O 3 . (iii) At equilibrium, DECREASING the volume will shift the equilibrium toward REACTANT. (iv) At equilibrium, INCREASING the volume will shift the equilibrium toward REACTANT . ( A ) Only (i) is true. ( B ) (ii) and (iv) are true. ( C ) (i) and (iv) are true. ( D ) (ii) and (iii) are true.

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( E ) (i) and (iii) are true. 4 For a process to be spontaneous it MUST be true that. .. ( A ) the entropy change of the system is zero. ( B ) the Gibbs free energy of the system decreases and S univ increases. ( C ) both the enthalpy and the entropy of the system decrease. ( D ) the entropy change of the system is positive. ( E ) heat is transferred from the system to the surroundings. 5 Calculate the P H of a solution prepared by dissolving 0.37 mol of hypochlorous acid HClO and 0.23 mol of sodium hypochlorite NaOCl in water with a total volume of 1.00 L of solution. The K a of hypochlorous acid is 3.0 10 8 . ( A ) P H 7.32 ( B ) P H 8.38 ( C ) P H 6.48 ( D ) P H 4.19 ( E ) P H 7.73 6 Choose the selection which lists the following acids in order of INCREASING acid strength (weakest acid first). HClO 2 HClO 3 HClO 4 HIO 2 HBrO 2 ( A )HClO 2 HClO 3 HClO 4 HIO 2 HBrO 2 ( B )HIO 2 HBrO 2 HClO 2 HClO 3 HClO 4 ( C )HClO 2 HBrO 2 HIO 2 HClO 3 HClO 4 ( D )HClO 2 HClO 3 HClO 4 HBrO 2 HIO 2 ( E )HClO 4 HClO 3 HClO 2 HBrO 2 HIO 2 7 Which CORRECTLY indicates the signs of the enthalpy change and the entropy change for the process shown below? Na s Na l ( A ) Δ H 0 0 and Δ S 0 0 ( B ) Δ H 0 0 and Δ S 0 0 ( C ) Δ H 0 0 and Δ S 0 0
( D ) Δ H 0 0 and Δ S 0 0 ( E ) Δ H 0 0 and Δ S 0 0 8 Calculate the concentration of iodide ions in a saturated solution of lead II iodide. The solubility product constant of PbI 2 is K sp 1.4 10 8 . ( A

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## This note was uploaded on 12/09/2009 for the course CHEM 1202 taught by Professor Staff during the Fall '08 term at LSU.

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bonus exam final 3 - Bonus Final Exam 3 1 Calculate the OH...

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