The following two reactions are proposed as elementary steps in the mechanism for an overall reaction: (1) NO2Cl(g)---> NO2(g) + Cl(g) (2) NO2Cl(g) + Cl(g) ---> NO2(g) + Cl2(g) ?

Question

What is the molecularity of reaction (1)? Type the word.

What is the molecularity of reaction (2)? Type the word.

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Answer 1 · 2018-02-27T18:49:33

(1) Unimolecular
(2) Bimolecular

#(1)" " "NO"_2"Cl"(g) -> "NO"_2(g) + "Cl"(g) #

It has only one molecule on the reactants' side, so it is UNImolecular.

The general unimolecular reactions would be

#"A " -> " products"#

#(2) " " "NO"_2"Cl"(g) + "Cl"(g) -> "NO"_2(g) + "Cl"_2(g)#

It has two molecules in the reactants, so it is BImolecular.

The general bimolecular reactions would be

#"A " + " B " -> " products"#

or

#"2A " -> " products"#