The following mechanism for the gas phase decomposition of oxygen difluoride is
ID: 940952 • Letter: T
Question
The following mechanism for the gas phase decomposition of oxygen difluoride is consistent with the observed rate law. step 1 fast. 2OF_2 O_2F_4 step 2: slow: O_2F_4 rightarrow O_2 + 2F_2 What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank. Enter the formula of any species that acts as a reaction intermediate? If non leave box blank. Complete the rate law for the overall reaction that is consistent with this mechanism. (Use the form k|A|^mlB|^n..., where 'I' is understood (so don't write it) for m, n etc.)Explanation / Answer
1)
add both equations
2OF + O2F4 --> O2F4 + O2 + 2F2
cancel common terms
2OF --> O2 + 2F2
2)
intermediate are those that will not appear in the overral reaction, that is, O2F4
3)
the rate of reaction; must be that of the slow step: since it is the determinantestep
therefore
Rte = -k*[O2F4]
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