Question

For the reaction \[\ce{Cl2_{(g)} + 2NO_{(g)} -> 2NOCl_{(g)}}\] the rate law is expressed as rate = k [Cl₂][NO]². What is the overall order of this reaction?

Answer 1

The given reaction is \[\ce{Cl2_{(g)} + 2NO_{(g)} -> 2NOCl_{(g)}}\] 

given rate law is rate = k [Cl₂][NO]²

Order with respect to Cl₂ = 1

Order with respect to NO = 2

Overall order = 1 + 2 = 3

∴ The overall order of the given reaction is 3.