chemistry - endothermic and exothermic reactions

• If the reactant molecules in a reaction have more energy in their chemical bonds than the product molecules, will energy be absorbed or released overall?

  released
• What is an exothermic reaction?

  A reaction where energy is transferred to the surroundings.
• If an exothermic reaction occurs in a closed container, what would happen to the temperature inside the container?

  increase
• What is an endothermic reaction?

  A reaction that ABSORBS energy in the form of heat
• If an endothermic reaction occurs in a closed container, what would happen to the temperature inside the container?

  decrease
• activation energy

  Activation energy is the minimum amount of energy the reactant particles require in order to collide with each other and react.
• Does breaking bonds release energy or require energy?

  require
• Is breaking bonds exothermic or endothermic?

  endothermic
• bond energy


  the amount of energy that will break a bond between two atoms
• how to calculate energy change

  (energy of) bonds broken - (energy of) bonds formed
• What type of reaction produces a negative energy change?

  exothermic