This document provides instructions for using a potential energy diagram to analyze a chemical reaction. It asks the reader to label different components on the diagram including reactants, products, and activated complex. It also asks the reader to determine values like activation energy and heat of reaction from the diagram and define key concepts such as heat of reaction. Finally, it asks the reader to compare forward and reverse activation energies for an exothermic reaction using the diagram.

1. 1. Using the following potential energy graph, answer the following questions.
2. Label the location of the reactants, products and activated complex.
3. How do you calculate activation energy when using a potential energy diagram?
4. How do you determine heat of reaction using a potential energy diagram?
5. What is the value of the potential energy of the reactants? Products? Activated complex?
6. How do you determine heat of reaction using a potential energy diagram?
7. What is heat of reaction and how do you determine it using a potential energy diagram?
8. What is the value of the activation energy based on this graph?
9. What is the value of the heat of reaction based on this graph?
10. Is this an endothermic or exothermic reaction?
11. If AB is an exothermic reaction, how does the activation energy for the forward reaction compare with the
activation energy for the reverse reaction? Use your potential energy diagram worksheet to answer this
question.
PE (kJ)
20
60
40
80
100
Reaction Pathway