Phosgene is a toxic gas prepared by the reaction of carbon monoxide with chlorin

Question

Phosgene is a toxic gas prepared by the reaction of carbon monoxide with chlorine:

CO (g)  +  Cl2 (g)  ? COCl2

These data were obtained in a kinetics study of its formation:

Experiment

Initial   Rate

(mol/L

  

Experiment

     

Initial   Rate

  

(mol/L

Phosgene is a toxic gas prepared by the reaction of carbon monoxide with chlorine: CO (g) + Cl2 (g) ? COCl2 These data were obtained in a kinetics study of its formation: Write the rate law for the formation of phosgene. Calculate the average value of the rate constant.

Explanation / Answer

a) Ten-fold changes in concentration of each reactant produces a ten-fold change in the reaction rate, so reaction is first order with respect to each of the reactants. First answer choice.

b) -rate = k[CO][Cl2] calculate k for each case given in a:

k=r/[CO][Cl2]
1: 3.225e-29
2: 3.325e-29
3: 3.25e-29
4: 3.3e-29
Average: 3.275E-29 (3.28E-29 if properly rounded)

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