Domanda del libro di testo
What is the molecularity of each of the following elementary
reactions?
(a)
(b)
(c)
942
views
Ch.14 - Chemical Kinetics
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Capitolo 14, Problema 46
The relative rates of the reaction A + B S AB in vessels
(1)–(3) are 4:4:1. Red spheres represent A molecules, and
blue spheres represent B molecules.
(1)-(3) 
(a) What is the order of the reaction in A and B?
Guida verificata passo dopo passo1
Identify the number of A and B molecules in each vessel. Vessel 1: 2 A and 3 B, Vessel 2: 4 A and 3 B, Vessel 3: 3 A and 2 B.
Note the given relative rates of the reaction in vessels 1, 2, and 3, which are 4:4:1.
Set up the rate law expression for the reaction: rate = k[A]^m[B]^n.
Compare the rates and concentrations between vessels to determine the reaction order. For example, compare vessels 1 and 2 to find the order with respect to A, and compare vessels 1 and 3 to find the order with respect to B.
Solve the equations derived from the comparisons to find the values of m and n, which represent the order of the reaction with respect to A and B, respectively.
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Reaction Order
The reaction order refers to the power to which the concentration of a reactant is raised in the rate law of a chemical reaction. It indicates how the rate of reaction is affected by the concentration of reactants. For example, a first-order reaction in A means that doubling the concentration of A will double the reaction rate, while a second-order reaction means that doubling A will quadruple the rate.
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Percorso guidato
00:36
Average Bond Order
Rate Law
The rate law expresses the relationship between the rate of a chemical reaction and the concentration of its reactants. It is typically written in the form Rate = k[A]^m[B]^n, where k is the rate constant, and m and n are the orders of the reaction with respect to reactants A and B, respectively. Understanding the rate law is crucial for determining how changes in concentration affect the reaction rate.
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Percorso guidato
01:52Rate Law Fundamentals
Stoichiometry of the Reaction
Stoichiometry involves the quantitative relationships between the reactants and products in a chemical reaction. In this case, the stoichiometry of the reaction A + B → AB can help determine the relative amounts of A and B that react. The given rates of reaction in different vessels can be analyzed to infer the stoichiometric coefficients, which are essential for deducing the order of the reaction in A and B.
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Percorso guidato
01:16Stoichiometry Concept
Pratica correlata
Domanda del libro di testo
Consider a reaction that occurs by the following mechanism:
A + BC → AC + B
AC + D → A + CD
The potential energy profile for this reaction is as follows:
(d) Is the reaction endothermic or exothermic? Add labels to the diagram that show the values of the energy of reaction ΔE and the activation energy Ea for the overall reaction.
523
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Domanda del libro di testo
The following pictures represent the progress of a reaction
in which two A molecules combine to give a more complex
molecule A2, 2 AS A2.
(b) What is the rate law?
578
views
Domanda del libro di testo
Consider a reaction that occurs by the following mechanism:
A + BC → AC + B
AC + D → A + CD
The potential energy profile for this reaction is as follows:
(b) Write structural formulas for all species present at reaction stages 1–5. Identify each species as a reactant, product, catalyst, intermediate, or transition state.
685
views
Domanda del libro di testo
Consider a reaction that occurs by the following mechanism:
A + BC → AC + B
AC + D → A + CD
The potential energy profile for this reaction is as follows:
(c) Which of the two steps in the mechanism is the rate-determining step? Write the rate law for the overall reaction.
354
views
Domanda del libro di testo
The following pictures represent the progress of the reaction AS B in which A molecules (red spheres) are converted to B molecules (blue spheres).
(c) Suppose that each sphere represents 6.0⨉1021 molecules and that the volume of the container is 1.0 L. What is the rate constant for the reaction in the usual units?
519
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