40 Equilibrium Constant Problems The data in the following table (molar concentr

Question

40 Equilibrium Constant Problems The data in the following table (molar concentration of N2Os versus time were obtained for the decomposition of dinitrogen pentoxide. 2N205(g) 4 NOz(g) + Oz(g) me in S B000 9000 1. Determine whether this decomposition reaction is zero, first, with respect to N2Os. or second order 2. The stoichiometric coefficient for N2Os in the reaction equation is 2. Depending on your answer to Problem 1, explain why the reaction order you obtained in Problem 1 also is 2, or explain why it can be different from 2. 2. Determine the rate constant for this reaction (magnitude and units). function of time as the reaction proceeds. Your graph should show these concentrations on the same scale, and show the final concentrations relative to each other after equilibrium has been reached. 3. Sketch a graph showing the relative concentrations of N20s, NO2, and 02 as a 4. Write a paragraph explaining why the concentrations vary as shown by your graph.

Explanation / Answer

1.Oder of a reaction with respect to a given substance is the index or exponent to whichthe concentration in the rate equation is raised.The rate of reaction is the change in concentration of the substance with change in time.In the given case, therate of dissociation of N2O5 decreases with time .ie,the rate of reaction id dependant on the concentration of N2O5.

The rate constant =[NO2]4 [O2] / [ N2O5]2

The value of exponent of N2O5 is 2.So it is a seconed order reaction.

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