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Question

Consider the chemical reaction,
N2(g)+3H2(g)2NH3(g)
The rate of this reaction can be expressed in terms of time derivatives of concentration of N2(g),H2(g) or NH3(g). Identify the correct relationship amongst the rate expressions.


A

Rate=d[N2]dt=13d[H2]dt=12d[NH3]dt

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B

Rate=d[N2]dt=3d[H2]dt=2d[NH3]dt

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C

Rate=d[N2]dt=13d[H2]dt=12d[NH3]dt

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D

Rate=d[N2]dt=d[H2]dt=d[NH3]dt

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Solution

The correct option is A

Rate=d[N2]dt=13d[H2]dt=12d[NH3]dt


For any general reaction,
aA+bBcC+dD
Rate=1ad[A]dt=1bd[B]dt
=1cd[C]dt=1dd[D]dt
For N2+3H22NH3
Rate=d[N2]dt=13d[H2]dt=12d[NH3]dt
Rate=k[N2O5]
[N2O5]=Ratek=2.40×1053×105=0.80 M


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