Fraction order reaction

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 Fraction order reaction

The reaction whose order is a fraction is called a fractional  order reaction. 

Example:
  
   (1) - Thermal decomposition of acetaldehyde 

                 ∆
CH³CHO ---> CH⁴ +CO, rate = k[CH³CHO]¹.⁵

(2)- Reaction between H² and Br² to form HBr 
H²(g) + Br²(g) --> 2HBr, rate = k[H²] [Br²]¹/²

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