Energy changes

• What type of reaction transfers energy to the surroundings?

  Exothermic
• What type of reaction transfers energy from the surroundings?

  Endothermic
• What type of reaction is this?

  Exothermic

  
• What type of reaction is this?

  Endothermic

  
• What is the activation energy?

  The minimum amount of energy that particles need to react
• How do you calculate the energy change?

  • Overall energy transfer = energy required to break bonds - energy required to make bonds
  • Positive = Endothermic
  • Negative = Exothermix