Â Fractional order reactions are those reactions in which the rate of reaction is raised to a fractional value with respect to the concentration of reactions.

There are several reactions which are
**Examples of Fractional Order Reaction.**

Some common examples of fractional order reactions are:

## Decomposition of acetaldehydeÂ

Experimental rate law: rate = k [CH3CHO]^{3/2}

Therefore the order of reaction = 3/2 = 1.5

Thus, decomposition of acetaldehyde is an example of fractional order
reaction because the order of the reaction is a fractional value.

##
Â Reaction between H_{2} and Br_{2}

Experimental rate law: rate = k [H2] [Br2]^{1/2}

Therefore order of the reaction = 1+1/2 = 3/2 =** **1.5

Thus, reaction between H2 and Br2 is an example of fractional order reaction because when it is calculated the the sum of order of reaction of the reactants is equal to 1.5 which is a fractional value.

## Â Dissociation of carbonyl chloride

Experimental rate law: Rate = k [COCl2]^{3/2}

Therefore order of the reaction = 3/2 = 1.5

Â Thus, when dissociation of carbonyl chloride occurs the order of the reaction presents itself to be 1.5, which is a fractional value and so dissociation of carbonyl chloride is an example of fractional order reaction.

##
Reaction between CO and Cl_{2}

Experimental rate law: Rate: k [CO]^{2} [Cl^{]1/2}

Therefore order of the reaction = 2+1/2 = 2.5

Â Thus, the reaction between CO and Cl2 is an example of fractional
order reaction. It has a value of 2.5

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