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

Solution: An energy profile for the reaction A (left), and the change in concentration of B as a function of time (right), with and without a catalyst. Green curves show the reaction with a catalyst; blac

Problem

First graph: The x-axis is reaction pathway and the y-axis is energy (increasing); both axes are unscaled. Curves show an uncatalyzed and a catalyzed reaction. Both begin at the reactants, A, and climb to a peak at the transition states, but the catalyzed peak is lower and thus has lower activation energy. Both curves then decline to the products, B, which are lower energy than the reactants. The second graph has time (increasing) on the x-axis and concentration of B on the y-axis. Both axes are unscaled. Curves show an uncatalyzed and a catalyzed reaction. Both begin at the origin and increase, but the catalyzed reaction proceeds more rapidly. The two reactions reach the same equilibrium mixture and flatten at the same point on the y-axis, but the catalyzed reaction achieves equilibrium faster.
An energy profile for the reaction A (left), and the change in concentration of B as a function of time (right), with and without a catalyst. Green curves show the reaction with a catalyst; black curves show the reaction without a catalyst.

What quantity dictates the speed of a reaction?