10462ndspring2011f4

10462ndspring2011f4 - GeneralChemistryI exam2 Form 4...

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General Chemistry I exam 2 10/20/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Consider the following reaction at equilibrium. What effect will reducing the volume of the reaction mixture have on the system? CuS(s) + O 2 (g) Cu(s) + SO 2 (g) A) The equilibrium constant will increase. B) The equilibrium constant will decrease. C) The reaction will shift to the right in the direction of products. D) The reaction will shift to the left in the direction of reactants. E) No effect will be observed. 1) 2) The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO 2 ( g ) + O 2 ( g ) 2 SO 3 ( g ). If initial concentrations are [SO 2 ] = 6.00 M, [O 2 ] = 0.45 M, and [SO 3 ] = 9.00 M, the system is A) not at equilibrium and will remain in an unequilibrated state. B) not at equilibrium and will shift to the left to achieve an equilibrium state. C) at equilibrium. D) not at equilibrium and will shift to the right to achieve an equilibrium state. 2) 3) Which of the following acids is the STRONGEST? The acid is followed by its K a value. A) HNO 2 , 4.6 × 10 - 4 B) HCN, 4.9 × 10 - 10 C) HCHO 2 , 1.8 × 10 - 4 D) HF, 3.5 × 10 - 4 E) HClO 2 , 1.1 × 10 - 2 3) 4) Express the equilibrium constant for the following reaction. CH 3 Cl(g) + 1/2 Cl 2 (g) CH 2 Cl 2 (g) + 1/2 H 2 (g) A) K = [CH 3 Cl][Cl 2 ] 1/2 [CH 2 Cl 2 ][H 2 ] 1/2 B) K = [CH 3 Cl][Cl 2 ] [CH 2 Cl 2 ][H 2 ] C) K = [CH 3 Cl] 2 [Cl 2 ] [CH 2 Cl 2 ] 2 [H 2 ] D) K = [CH 2 Cl 2 ] 2 [H 2 ] [CH 3 Cl] 2 [Cl 2 ] E) K = [CH 2 Cl 2 ][H 2 ] 1/2 [CH 3 Cl][Cl 2 ] 1/2 4) D 1
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5) Consider the following reaction at equilibrium. What effect will increasing the temperature have on the system? Fe 3 O 4 (s) + CO(g) 3 FeO(s) + CO 2 (g) Δ = +35.9 kJ A) No effect will be observed.
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This note was uploaded on 12/17/2011 for the course CHM 1046 taught by Professor Staff during the Fall '08 term at FIU.

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10462ndspring2011f4 - GeneralChemistryI exam2 Form 4...

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