Q.

For a first order reaction involving decomposition of N2O5 .  the following information is available.

2N2O5(g)4NO2(g)+O2(g)     rate =kN2O5N2O5(g)2NO2(g)+12O2(g)     rate =kN2O5

Which of the following expressions is true?

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a

k=k

b

k>k

c

k=3k

d

k=2k

answer is D.

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Detailed Solution

For 2N2O5(g)4NO2(g)+O2(g); 12dN2O5dt=kN2O5

For N2O5(g)2NO2(g)+12O2(g); dN2O5dt=kN2O5

Since -d[N2O5 ]/dt does not depend upon the way the chemical reaction is formulated, we will have k' = 2k.

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