Review I Constants I Periodic TableLearning Goal:To understand how elementary steps make up amechanism and how the rate law for an elementary stepOrder and rate law of a reactioncan be determined.The overall order of an elementary step directly corresponds to its molecularity. Both stepsin this example are second order because they are each bimolecular. Furthermore, the ratelaw can be determined directly from the number of each type of molecule in an elementarystep. For example, the rate law for step 1 isVery often, a reaction does not tell us the whole story.For instance, the reactionNO2(9) + CO(9)→NO(g)+ CO2(g)rate = k[NO2]2does not involve a collision between an NO, moleculeand a CO molecule. Based on experimental data atmoderate temperatures, this reaction is thought to occurin the following two steps:The exponent "2" is used because the reaction involves two NO2 molecules. The rate lawfor step 2 israte = k[NO3]'[CO]* = k[NO3][CO]1. NO2(9) + NO2(9)→NO3(9)+NO(g)2. NO3(g) + CO(9)→CO2(9) +NO2(g9)because the reaction involves only one molecule of each reactant the exponents areomitted.Each individual step is called an elementary step.Together, these elementary steps are called the reactionmechanism.Analyzing a new reactionOverall, the resulting reaction isConsider the following elementary steps that make up the mechanism of a certain reaction:NO2 (9) + CO(g)→NO(g)+ CO2(g)1. 3X→E+F2. E + M→F +NNotice that in the elementary steps NO3 appears bothas a product and then as a reactant; therefore it cancelsoutmical equation. NO3 is called areaction intermediate. Also notice that 2 molecules ofPart ANO2 appear in the reactants of the first step and 1molecule of NO2 appears as product of the secondstep, the net effect leaves only 1 molecule of NO2 asWhat is the overall reaction?

The given elementary steps are the following. 3X→E+FE+M→F+N

Answered: Analyzing a new reaction Consider the…

Analyzing a new reaction Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3X→E+F 2. E+ M→F+N Part A What is the overall reaction?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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