answer question 3 show all steps Ditto 14. Extra Kinetics Problems 1. The follow

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answer question 3 show all steps

Ditto 14. Extra Kinetics Problems 1. The following reaction has a 2nd order 2 NO2 (g) + F,(g) 2 NO:F(g Propose a mechanism consistent with the observed rate law 2. Consider the mechanism shown a. b. c. Find the overall equation. Identify any reaction intermediates. Determine the molecularity of each step 3. For the reaction X +Y+ z- XY+Xz it is found that doubling the concentration of X doubles the reaction rate, tripling the concentration of Y triples the rate, and doubling the concentration of Z has no effecet a. What is the rate law for this reaction? b. Why is it that the change in concentration of Z has no effect on the rate? Suggest a mechanism for the reaction that is consistent with the rate lavw. 4. Consider the reaction The following data are obtained at 360 K: initial rate of disappearance of X (M/s) [XJmal 0.10 0.20 0.40 0.20 0.40 0.50 0.30 0.60 0.60 0.30 0.147 0.127 1.016 0.508 a. Determine the rate law for the reaction. b. Determine the order of the reaction. c. Determine the initial rate of disappearance of X when the initial concentrations of X and Y are 0.70M and 0 respectively 5. Consider the following elementary step: X + 2Y XY2 a. Write a rate law for this reaction. b. If the initial rate of formation of XY, is 0.0038 M/s and the initial concentrations X amd Y are 0.26 M an what is the rate constant of the reaction?

Explanation / Answer

3)

a)

doubling concentration of X2 doubles the rate

So, order of X2 is 1

tripling concentration of Y triples the rate

So, order of Y is 1

Z has no effect.

So, Z do not appear in rate law

So, rate law is:

rate = k [X2][Y]

b)

concentration of Z has no effect on rate because Z must not be part of rate determining step

c)

Rate depends on the slowest step

Lets make the 1st step as slowest

Then reactant in 1st step should have 1 molecule each of X2 and Y

step 1: X2 + Y —> X2Y (slow step)

step 2: X2Y + Z —> XY + XZ (fast step)

Adding both step should given overall reaction

Feel free to comment below if you have any doubts or if this answer do not work

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