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For a reaction : 2NH(3)(g) overset(P...

For a reaction :
`2NH_(3)(g) overset(Pt)rarr N_(2)(g)+3H_(2)(g)` Rate = k
(i) Write the order and molecularity of this reaction.
(ii) Write the unit of k.

Text Solution

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(i) Rate = k shows that the rate of reaction is independent of the concentrations of the reactants. Hence, it is a reaction of zero order. As two molecules of the reactant are persent in the reaction, molecularity is two.
(ii) Units of k will be same as that of the rate of reaction viz. `"mol L"^(-1)s^(-1)`.
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