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The following is a proposed mechanism for the gas phase decomposition of nitryl

ID: 501321 • Letter: T

Question

The following is a proposed mechanism for the gas phase decomposition of nitryl chloride. step 1 fast NO Cl Nos, Cl step 2 slow: NO2Cl+ Cl NO2 Cl (1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank (2) Which species acts as a catalyst? Enter formula. If none, leave box blank: (3) Which species acts as a reaction intermediate? Enter formula. If none, leave box blank: C4) Complete the rate law for the overall reaction that is consistent with this mechanism Use the form kLA]m[B]n, where '1' is understood (so don't write it if it's a '1') for m, n etc. Rate

Explanation / Answer

Overall rate equation is

2NO2Cl ---> 2 NO2 + Cl2

No catalyst is used here

Here intermediate is Cl

The rate law is always slowest step,

Rate = k(NO2Cl)m (Cl)n

(2)

Overall rate equation is

2NO + Br2 ---> 2 NOBr

No catalyst is used here

Here intermediate is NOBr2

The rate law is always slowest step,

Rate = k(NOBr2)m (NO)n