Exothermic and Endothermic Reactions

• In an exothermic reaction, I’d hear transferred to or from the surroundings?


  To the surroundings.
• Name two different types of reactions which are exothermic?

  Combustion Reactions and Oxidation
• Define what is meant by an endothermic reaction?

  A reaction that absorbs heat from its surroundings.
• Write down the equation for the thermal decomposition of calcium carbonate

  CaCO3(s)Heat⟶CaO (s)+CO2(g)
• What is the purpose of putting the reaction container into a beaker containing cotton wool during an experiment to investigate the temperature change of an exothermic reaction?

  Insulation
• What is the activation energy of a reaction?

  The minimum energy required for a reaction to occur.
• Is the following statement true or false? In an endothermic reaction, the products of the reaction have more energy than the reactants?


  True.