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: A certain compound, A, reacts to form products according to the reaction A → P. The amount of A is measured as a function of time under a variety of different conditions and the tabulated results are shown here:Time (s)25.0 oC [A] (M)35.0 oC [A] (M)45.0 oC [A] (M)01.0001.0001.000100.7790.6620.561200.5910.4610.312300.4530.3060.177400.3380.2080.100500.2590.1360.057600.2000.0930.032The same reaction is conducted in the presence of a catalyst, and the following data are obtained:Time (s)25.0 oC [A] (M)35.0 oC [A] (M)45.0 oC [A] (M)01.0001.0001.0000.10.7240.6680.5980.20.5110.4330.3410.30.3750.2910.2020.40.2750.1900.1190.50.1980.1220.0710.60.1410.0800.043How does the activation energy of the catalyzed reaction compare with the activation energy for the reaction when the catalyst isn't present?

Problem

A certain compound, A, reacts to form products according to the reaction A → P. The amount of A is measured as a function of time under a variety of different conditions and the tabulated results are shown here:

Time (s)25.0 oC [A] (M)
35.0 oC [A] (M)
45.0 oC [A] (M)
01.0001.0001.000
100.7790.6620.561
200.5910.4610.312
300.4530.3060.177
400.3380.2080.100
500.2590.1360.057
600.2000.0930.032


The same reaction is conducted in the presence of a catalyst, and the following data are obtained:

Time (s)25.0 oC [A] (M)35.0 oC [A] (M)45.0 oC [A] (M)
01.0001.0001.000
0.10.7240.6680.598
0.20.5110.4330.341
0.30.3750.2910.202
0.40.2750.1900.119
0.50.1980.1220.071
0.60.1410.0800.043

How does the activation energy of the catalyzed reaction compare with the activation energy for the reaction when the catalyst isn't present?