Chemical Kinetics — Chapter Summary
Telangana Open School (TOSS) · Class 12 · Chemistry
Summary of Chemical Kinetics for Telangana Open School (TOSS) Class 12 Chemistry. Part of the Telangana Open School (TOSS) Class 12 Chemistry syllabus.
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Overview
Chemical Kinetics is the study of the speed or rate at which chemical reactions occur. While thermodynamics tells us whether a reaction can happen, kinetics explains how fast it happens. Some reactions, like rusting of iron, are very slow, while others, like the formation of a precipitate when silve
Key Concepts
The rate of a chemical reaction
The rate of a chemical reaction is the change in concentration of a reactant or product per unit time. It is expressed as mol L⁻¹ s⁻¹. For a reaction
Average rate is the change
Average rate is the change in concentration over a finite time interval. Instantaneous rate is the rate at a specific moment, found by making the time
The rate law expresses the rate
The rate law expresses the rate of a reaction as proportional to the concentrations of reactants raised to some powers: Rate = k[A]^x[B]^y. The consta
The order of a reaction
The order of a reaction is the sum of the exponents in the rate law. For example, if Rate = k[NO]²[O₂], the reaction is second order in NO, first orde
The half
The half-life (t₁/₂) is the time required for the concentration of a reactant to reduce to half its initial value. For a first-order reaction, t₁/₂ =
Learning Objectives
- Explain the rate of a chemical reaction
- Differentiate between average and instantaneous rate
- Correlate rates with concentration changes of reactants and products
- Define rate law and rate constant
- Define and distinguish order and molecularity of a reaction
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