Domanda del libro di testo
A reaction A + B → C obeys the following rate law: Rate = k[B]2. (c) What are the units of the rate constant?
Ch.14 - Chemical Kinetics
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 14, Problema 27a
A reaction A + B → C obeys the following rate law: Rate = k[B]2. (a) If [A] is doubled, how will the rate change? Will the rate constant change?
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1. The rate law for the reaction is given as Rate = k[A][B]^2. This equation tells us that the rate of the reaction is directly proportional to the concentration of A and the square of the concentration of B.
2. If the concentration of A is doubled, the rate of the reaction will also double. This is because the rate of the reaction is directly proportional to the concentration of A. So, if [A] is doubled, the rate will also double.
3. The rate constant, k, is a proportionality constant that is specific to a particular reaction at a particular temperature. It does not change with changes in the concentrations of the reactants. Therefore, even if the concentration of A is doubled, the rate constant, k, will remain the same.
4. So, in conclusion, if [A] is doubled, the rate of the reaction will double, but the rate constant will not change.
5. Remember, the rate constant is only affected by changes in temperature, not by changes in the concentrations of the reactants.
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Rate Law
A rate law expresses the relationship between the rate of a chemical reaction and the concentration of its reactants. It is typically formulated as 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 each reactant. Understanding the rate law is crucial for predicting how changes in concentration affect the reaction rate.
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Percorso guidato
01:52
Rate Law Fundamentals
Order of Reaction
The order of a reaction refers to the exponent to which the concentration of a reactant is raised in the rate law. It indicates how sensitive the reaction rate is to changes in that reactant's concentration. In the given rate law, the order with respect to B is 4, meaning that if the concentration of B is increased, the rate will increase significantly, while changes in A do not affect the rate since it is not included in the rate law.
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00:36Average Bond Order
Rate Constant (k)
The rate constant (k) is a proportionality factor in the rate law that is specific to a particular reaction at a given temperature. It reflects the intrinsic speed of the reaction and does not change with the concentration of reactants. However, it can change with temperature or the presence of a catalyst. In this scenario, doubling the concentration of A will not affect the rate constant, as it is independent of reactant concentrations.
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Percorso guidato
01:14Equilibrium Constant K
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