exothermic and endothermic reactions

• describe exothermic reaction

  reaction that transfers energy to the surroundings that increases temperature of surroundings
• describe bonding of exothermic reactions

  energy released from bond forming greater than energy needed for bond breaking
• give examples of exothermic reactions

  combustion, oxidation and neutralisation
• describe structure of exothermic reaction profile

  reactants have higher energy than products
• describe endothermic reactions

  reactions that transfer energy from surroundings that decreases temperature of surroundings
• describe bonding of endothermic reactions

  energy needed for bond breaking greater than energy released from bond forming
• give examples of endothermic reactions

  thermal decomposition, reaction of citric acid and sodium hydrogencarbonate and sport injury packs
• describe reaction profile of endothermic reactions

  reactants have lower energy than products
• describe activation energy

  minimum amount of energy needed for particles to collide and react