bond Energies

• breaking bonds requires energy
• breaking bonds is an endothermic reaction
• The term 'bond energy' refers to the amount of energy required to break one mole of a particular covalent bond
• bond energy values are always positive
• forming a bond is an exothermic reaction
• During a chemical reaction, the bonds of the products must be:

  • formed
• What type of reaction produces a positive energy change value:

  • endothermic