endothermic and exothermic reactions

• combustion of methane


  CH4 + 2O2 -> CO2 + 2H2O
• exothermic meaning


  heat/energy given out
• endothermic meaning


  heat/ energy taken in
• exothermic reaction examples


  combustion

  respiration

  neutralisation
• endothermic reaction examples


  dissolving

  thermal decomposition
• bendo mexo graph

  
• exothermic graph explanation


  the amount of energy needed to break bonds is less than the energy released when new bonds are made
• endothermic graph explanation 


  the energy needed to break bonds is higher than the energy released when new bonds are made
• what is activation energy?

  the minimum amount of energy required for a reaction to occur
• energy is needed to break bonds and energy is released when new bonds are made