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Discussion6 - Discussion#6 Chem002 February 20&21 2008 CO(g...

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Discussion#6 Chem002 February 20&21, 2008 [1] Consider the equilibrium C (s) + H 2 O (g) CO (g) + H 2(g) A 2.0 L container is charged with 4.0 mol of carbon and 4.0 mol of water and brought to temperature. At equilibrium the [CO] = 1.5 mol/L. What is the value of K c ? [2] Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine. CCl 4 (g) + (1/2)O 2 (g) COCl 2 (g) + Cl 2 (g) K c = 4.4 × 10 9 at 1,000 K Calculate K c for the reaction 2CCl 4 (g) + O 2 (g) 2COCl 2 (g) + 2Cl 2 (g). [3] 1.75 moles of H 2 O 2 were placed in a 2.50 L reaction chamber at 307 ° C. After equilibrium was reached, 1.20 moles of H 2 O 2 remained. Calculate the equilibrium constant, K c , for the reaction 2H 2 O 2 (g) 2H 2 O(g) + O 2 (g). [4] For the reaction PCl 3 (g) + Cl 2 (g) PCl 5 (g), K c = 32.4. Suppose a system at that temperature is prepared with: [PCl 5 ] = 0.50 M, [Cl 2 ] = 0.40 M, and [PCl 3 ] = 0.10 M. Which of the following is correct? A. The reaction will proceed in the direction of forming more PCl 5 and Cl 2 until equilibrium is reached.
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