Energy Level Diagrams

• Energy level diagrams are a representation of chemical reactions that include the relative energies of the reactant and product.
• The energy change of a reaction is represented through the difference in height between the reactant and its product.
• Activation energy (Ea) is the minimum energy required for the reaction to take place
• Endothermic energy level diagram:

  Energy is gained by the system; higher activation energy required

  
• Exothermic energy level diagram:

  Energy is lost by the system; lower activation energy required