Energy Calculations

• EXOTHERMIC Reactions:

  • Bond MAKING is an EXOTHERMIC reaction!!
  • A reaction will be exothermic if more energy is released when making the bonds in the products that was needed to break the bonds in the reactants.

  
• ENDOTHERMIC Reactions:

  • Bond BREAKING is an ENDOTHERMIC process!!
  • A reaction will be endothermic if more energy is absorbed when breaking the bonds in the reactants than was needed to make the bonds in the products.

  
• Overall energy change= REACTANTS- PRODUCTS

  ALWAYS!!