Ch.13 - Chemical KineticsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Problem

A concentration-time study of the gas phase reaction 2 A3 → 3 A2 produced the data in the table below.

What is the average rate of decomposition of A3 in the time interval 20-30 seconds? Enter your answer in exponential format (example 1.23E-4) with two decimal places and no units.

a. -6.2E-5

b. -5.0E-6

c. -4.3E-6

d. +4.3E-6

e. +3.2E-5

Solution

Determine the average rate of decomposition for A3 over a 20-30s time interval.

The rate of a chemical reaction is the speed at which the reactants are converted into products.

It is expressed as the change in concentrations of reactants or products over time.

The given reaction is:

2 A3 → 3 A2

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