Solved: Determining Molecularity and Identifying

Chapter , Problem 1PE

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Problem 1PE

Determining Molecularity and Identifying Intermediates

It has been proposed that the conversion of ozone into 02 proceeds by a two-step mechanism:

O3(g) → o2(g) + O(g)

O3(g) + O(g) → 2 O2(g)

(a)        Describe the molecularity of each elementary reaction in this mechanism.

(b)        Write the equation for the overall reaction.

(c)        Identify the intermediate(s).

Consider the following two-step reaction mechanism:

A(g) + B(g).X(g) + Y(g)

X(g) + C(g).Y(g) + Z(g)

Which of the following statements about this mechanism is or are true?

(i) Both of the steps in this mechanism are bimolecular.

(ii) The overall reaction is A(g) + B(g) + C(g).Y(g) + Z(g).

(iii) The substance X(g) is an intermediate in this mechanism.

(a) Only one of the statements is true.

(b) Statements (i) and (ii) are true.

(c) Statements (i) and (iii) are true.

(d) Statements (ii) and (iii) are true.

(e) All three statements are true.