Exam 13: Chemical Kinetics

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A reaction is found to have an activation energy of 38.0 kJ mol-1.If the rate constant for this reaction is 1.60 × 102 L mol-1 s-1 at 249 K,what is the rate constant at 436 K?

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D

Given the following balanced equation,determine the rate of reaction with respect to [O3].If the rate of loss of O3 is 3.91 × 10-1 mol L-1 s-1,what is the rate of the formation of O2? 2O3(g)→ 3O2(g)

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D

What is the activation energy for a reaction that has a rate constant of 0.0883 L mol-1 s-1 at 333 K and 0.469 L mol-1 s-1 at 366 K?

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C

Without performing complex calculations,determine the order of a reaction that has the following initial rates for the specified starting concentration: [] Initial Rate 0.20 0.0050 0.40 0.020 0.80 0.080

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Given the following balanced equation,determine the rate of reaction with respect to [NOCl].If the rate of Cl2 loss is 4.84 × 10-2 mol L-1 s-1,what is the rate of formation of NOCl? 2NO(g)+ Cl2(g)→ 2NOCl(g)

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The first-order decomposition of N2O at 1000 K has a rate constant of 0.76 s-1.If the initial concentration of N2O is 10.9 mol L-1,what is the concentration of N2O after 9.6 s?

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Given the following rate law,how does the rate of reaction change if the concentration of Y is doubled? Rate = k [X]2[Y]3

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Determine the missing initial rate for the following 12\frac{1}{2} order reaction given the following information: [] Initial Rate 0.8456 0.0326 0.6843 0.0293 0.4321 ?

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Without performing complex calculations,determine the order of a reaction that has the following initial rates for the specified starting concentration: []() Initial Rate 0.0143 3.00\times1 0.0429 9.00\times1 0.0715 1.5\times1

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Which of the following statements is FALSE?

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Calculate the frequency factor,A,for a reaction with a rate constant of 6.3 × 103 s-1 and an activation energy,Ea,of 74 kJ mol-1 at 315 K.

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The isomerization of methylisonitrile to acetonitrile CH3\mathrm { CH } _ { 3 } NC(g)? CH3\mathrm { CH } _ { 3 } CN(g) is first order in CH3\mathrm { CH } _ { 3 } NC.The rate constant for the reaction is 5.26 × 10-3 s−1s ^ { - 1 } at 531 K.The  half-life \text { half-life } of the reaction when the initial [ CH3\mathrm { CH } _ { 3 } NC] is 0.030 mol L-1 is ________ s.

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The rate of disappearance of HBr in the gas phase reaction 2HBr(g)? H2\mathrm { H } _ { 2 } (g)+ Br2\mathrm { Br } _ { 2 } (g) Is 0.190 mol L-1 s−1s ^ { - 1 } at 150 °C.The rate of reaction is ________ mol L-1 s−1s ^ { - 1 } .

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For a particular first-order reaction,it takes 24 minutes for the concentration of the reactant to decrease to 25% of its initial value.What is the value for rate constant (in s-1)for the reaction?

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A reaction is found to have a rate constant of 3.36 × 104 L mol-1 s-1 at 344 K and a rate constant of 7.69 L mol-1 s-1 at 219 K.Determine the activation energy for this reaction.

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Given the following balanced equation,determine the rate of reaction with respect to [NOCl].If the rate of NO loss is 1.68 × 10-2 mol L-1 s-1,what is the rate of formation of NOCl? 2NO(g)+ Cl2(g)→ 2NOCl(g)

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The aquation of tris (1,10-phenanthroline)iron(II)in acid solution takes place according to the equation: Fe(phen)32+ + 3H3O+ + 3H2O → Fe(H2O)62+ + 3phenH+. If the activation energy,Ea,is 126 kJ mol-1 and the rate constant at 30 °C is 9.8 × 10-3 min-1,what is the rate constant at 35°C?

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Which of the following represents the equation for a first-order half-life?

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Which of the following represents the integrated rate law for a second-order reaction?

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The reaction that occurs in a Breathalyzer,a device used to determine the alcohol level in a person's bloodstream,is given below.If the rate of appearance of Cr2(SO4)3 is 1.64 mol min-1 at a particular moment,what is the rate of disappearance of C2H6O at that moment? 2K2Cr2O7 + 8H2SO4 + 3C2H6O → 2Cr2(SO4)3 + 2K2SO4 + 11H2O

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