Consider the following 2N2O5 → 2N2O4+O2 , the molecularity and order of reaction for this reaction is:
Correct answer: D. 2,1
- A. 1,1
- B. 1,2
- C. 2,0
- D. 2,1
Explanation
The molecularity of a reaction refers to the number of molecules or atoms that are involved as reactants in a single elementary reaction step. In the given reaction: 2N2O5 → 2N2O4 + O2 We see that two molecules of N2O5 (dinitrogen pentoxide) are reacting together to form two molecules of N2O4 (dinitrogen tetroxide) and one molecule of O2 (oxygen gas). This reaction involves two molecules of N2O5 colliding simultaneously to form the products. Therefore, the molecularity of this reaction is 2, indicating a bimolecular reaction. So, the correct molecularity and order of reaction for this reaction are: Molecularity: 2 Order: 1 In summary, the correct answer is: 2,1.
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Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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