Lesson: Bond Energy Chemistry • 10th Grade

In this lesson, we will learn how to describe bond energies and use net changes in bond energy during reactions to calculate the bond energies of reactants and products.

Lesson Plan

Students will be able to

define bond energy and state the units such values are given in,
identify that the standard value of a bond strength is given per mole of bonds and not per bond,
calculate the enthalpy of a reaction from given bond energies or vice versa,
identify the relationship between bond energy and bond strength and the general trend in energies of single, double, and triple bonds,
understand that bond making is exothermic and bond breaking is endothermic,
understand that the overall heat change in a reaction depends upon the heat released from bond making versus the heat required for bond breaking,
realize that many chemical reactions generally involve the breaking of chemical bonds, but the amount of energy needed can vary,
identify the points at which bonds are broken and made on a reaction profile diagram.