Question:
The rate equation for the reaction \(xA + yB \rightarrow mC + nD\) is rate \(= k[A]^{1/2}[B]^{3/2}\). What is the total order of the reaction?
The rate equation for the reaction \(xA + yB \rightarrow mC + nD\) is rate \(= k[A]^{1/2}[B]^{3/2}\). What is the total order of the reaction?
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Reaction order can be zero, fractional, or an integer, unlike molecularity.
Updated On: Apr 27, 2026
- 2.0
- 1.5
- 1.0
- 0.5
- 2.5
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The Correct Option is A
Solution and Explanation
Step 1: Concept
The overall order of a reaction is the sum of the exponents of the concentration terms in the rate law.
Step 2: Meaning
Order $= n + m$, where $n$ and $m$ are the partial orders with respect to reactants A and B.
Step 3: Analysis
From the given rate law: Order $= 1/2 + 3/2 = 4/2 = 2$.
Step 4: Conclusion
Hence, the total order of the reaction is 2.0.
Final Answer: (A)
The overall order of a reaction is the sum of the exponents of the concentration terms in the rate law.
Step 2: Meaning
Order $= n + m$, where $n$ and $m$ are the partial orders with respect to reactants A and B.
Step 3: Analysis
From the given rate law: Order $= 1/2 + 3/2 = 4/2 = 2$.
Step 4: Conclusion
Hence, the total order of the reaction is 2.0.
Final Answer: (A)
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