science

• Endothermic reaction


  A chemical reaction that absorbs heat energy from the surroundings.
• Exothermic reaction


  A chemical reaction that releases heat energy to the surroundings.
• what is exothermic?

  exothermic gets hot as it releases heat energy.
• what is endothermic?

  endothermic absorbs heat.
• what are exothermic examples?

  self-heating cans , oxidation , hand warmers , combustion , neutralisation.
• what are endothermic examples?

  sports injury pack , thermal decomposition , reaction between citric acid & sodium carbonate.
• The role of the polystryrene cup and lid is to keep the temperature and keep the heat in.
• Insulate metal container for accuracy.