Rate Law Application
For 2A + B → Products with rate = k[A]²[B], overall order is:
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About This Question
- Subject
- chemistry
- Chapter
- chemical kinetics
- Topic
- rate law application
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
3
- Rate Law: Rate=k[A]x[B]y.
- Definition of Order: The overall order of a reaction is the sum of the exponents of all concentration terms in the rate law.
- Analysis of Given Law:
- Order with respect to A is 2.
- Order with respect to B is 1 (implied as no exponent is shown).
- Calculation: Overall Order =2+1=3.
- Note: The stoichiometric coefficients (2 for A) do not determine order unless the reaction is elementary.
This easy difficulty chemistry question is from the chapter chemical kinetics, covering the topic of rate law application. It appeared in the 2025 exam.
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