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Ch.7 Energy, Rate and EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 Matter and Measurements
Ch.2 Atoms and the Periodic Table
Ch.3 Ionic Compounds
Ch.4 Molecular Compounds
Ch.5 Classification & Balancing of Chemical Reactions
Ch.6 Chemical Reactions & Quantities
Ch.7 Energy, Rate and Equilibrium
Ch.8 Gases, Liquids and Solids
Ch.9 Solutions
Ch.10 Acids and Bases
Ch.11 Nuclear Chemistry
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Nature of Energy
First Law of Thermodynamics
Endothermic & Exothermic Reactions
Bond Energy
Thermochemical Equations
Heat Capacity
Thermal Equilibrium (Simplified)
Hess's Law
Rate of Reaction
Energy Diagrams
Chemical Equilibrium
The Equilibrium Constant
Le Chatelier's Principle
Solubility Product Constant (Ksp)
Spontaneous Reaction
Entropy (Simplified)
Gibbs Free Energy (Simplified)

An Energy Diagram is a curved plot on a graph that Illustrates the energies of reactants, products and transition state as a reaction occurs.

Energy Diagram

Concept #1: Energy Diagram

Example #1: What is the energy value for the product within the following energy diagram?

Concept #2: Speed of Reactions

Example #2: Which reaction will occur in the shortest amount of time? 

a) Reaction A (Ea = 143 kJ)                   

b) Reaction B (Ea = 80 kJ)          

c) Reaction C (Ea = 215 kJ)

Concept #3: Stability

Practice: Which of the following statements is true regarding the energy diagram provided?

i. The reaction is endothermic.
ii. The activation energy is +10 kJ.
iii. The reaction releases energy.
iv. The enthalpy of the reaction is –25 kJ.

Practice: Which of the following reactions proceeds the slowest? 


              Reaction 1                                             Reaction 2                                       Reaction 3