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Question

For the reaction, N2O52NO2+1/2O2,
d[N2O5]dt=k1[N2O5]
d[NO2]dt=k2[N2O5]
d[O2]dt=k3[N2O5]
The relation in between k1,k2 and k3 is:

A
2k1=k2=4k3
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B
k1=k2=k3
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C
2k1=4k2=k3
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D
none of the above
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Solution

The correct option is A 2k1=k2=4k3
The stoichiometric coefficient do not affect how the rate law is written but they do affect the value of rate constant k for the given reaction ; rate constants very as
k1coeff.ofN2O5=k2coeff.ofNO2=k3coeff.ofO2

So, 2k1=k2=4k3

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