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X + Y → Z. The rate equation for the chemical reaction above is \(\frac{-Δx}{Δt}\) =...

Chemistry
JAMB 1999

X + Y → Z. The rate equation for the chemical reaction above is \(\frac{-Δx}{Δt}\) = K[X]\(^2\)[Y].
The overall order of the reaction is?

  • A. 0.0
  • B. 1.0
  • C. 2.0
  • D. 3.0
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Correct Answer: Option D
Explanation

The overall order of a reaction is the sum of the exponents in the rate law. 

The rate equation is  \(\frac{-Δx}{Δt}\) = K[X]\(^2\)[Y].

The exponent for [X] = 2

The exponent for [Y] = 1

The overall order is the sum of the exponents = 2 + 1 = 3


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