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Question

The reaction 2H2(g)+2NO(g)2H2O(g)+N2(g) is first order in NO. The rate constant of the reaction at a certain temperature is 4.42M2s1 Calculate the rate when [H2]=0.015M and [NO]= 0.025 M ?

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Solution

The given reaction is:

2H2(g)+2NO(g)2H2O(g)+N2(g)

According to questions, the reaction is first order with respect to NO. So,
Rate=K[NO]
where, K is a rate constant.

Now, K=4.42M2s1 , [H2]=0.015M, [NO]=0.025M
Putting these values in eqn(i):-
Rate= 4.42×0.025Ms1
=0.1105Ms1

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