Exam 9: Reaction Rates and Chemical Equilibrium

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The equilibrium for the reaction for the decomposition of PCl5 to chlorine and PCl3 is 0.042. PCl5(g) ⇌ PCl3(g)+ Cl₂(g) If the equilibrium concentrations are [PCl3] = 0.010 M, [Cl₂] = 0.10 M, what is the value of [PCl5]?

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For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 × 10-1. At equilibrium at a certain temperature, the concentration of product was 0.60 M. What was the concentration of carbon dioxide at that temperature? C(s) + CO₂(g) ⇌ 2CO(g)

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In an exothermic reaction, heat can be considered a __________.

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For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. If the concentration of both products is 0.10 M at equilibrium, what is the concentration of the starting material, NOBr? 2NOBr(g) ⇌ 2NO(g) + Br₂(g)

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For the reaction of carbon with carbon dioxide to make carbon monoxide, the reaction is as follows. C(s) + CO₂(g) ⇌ 2CO(g) Adding additional C(s) to the reaction container will cause __________ to occur.

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In the following gas phase reaction, Kc is much less than 1. At equilibrium, which of the following statements is true? COCl₂(g) ⇌ CO(g) + Cl₂(g)

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When you open a bottle of a soft drink and leave it open, the drink eventually goes flat. This happens because the equilibrium between carbonic acid and carbon dioxide shifts to produce

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In the following gas phase reaction, what is the effect of adding more NO₂ to the starting reaction mixture? 2NO₂(g) ⇌ N₂O₄(g)

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A chemical reaction has reached equilibrium when

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What is the correct form of the equilibrium constant for this reaction? 2H?O?(g) ? 2 H?O (g) + O?(g)

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A heterogeneous equilibrium is one in which the reactants and products are found in two or more physical states.

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