The reaction 2NO2 + F2 2NO2F is first order with respect to both NO2 and F2 – [Free] B98
The reaction 2NO2 + F2 2NO2F is first order with respect to both NO2 and F2. what is the rate law of the reaction?
Rate Law of a First-Order Reaction
Question:
The reaction 2NO₂ + F₂ → 2NO₂F is first order with respect to both NO₂ and F₂. What is the rate law of the reaction?
Solution:
The rate law for a reaction expresses how the rate depends on the concentration of each reactant. For a general reaction:
aA + bB → products
If the reaction is first order in A and first order in B, the rate law is:
rate = k [A][B]
For the given reaction:
2NO₂ + F₂ → 2NO₂F
It is given that the reaction is first order in NO₂ and first order in F₂. Therefore, the rate law will be:
rate = k [NO₂][F₂]
Explanation:
- The order of the reaction is determined experimentally and not necessarily from the stoichiometric coefficients.
- First order with respect to NO₂ means the rate is directly proportional to the concentration of NO₂.
- First order with respect to F₂ means the rate is also directly proportional to the concentration of F₂.
- Multiplying both together gives the overall rate law.
Final Answer:
rate = k [NO₂][F₂]