14.2 Energy and Chemical Reactions Energy is in chemical reactions in two ways: to break some (or all) chemical bonds between atoms in the To form new chemical bonds to make new

Two Types of Energy Transfers We classify chemical reactions based on how the energy is transferred between the – Heat is by the reactants during the reaction (“In”). Examples – Heat is by the reactants during the reaction (“Exit”). Examples

Energy is also Transferred in Physical Changes (recall phase changes) Exothermic: Endothermic: