In an endothermic reaction the temperature of the substance decreases
They can be useful in technology such as cold packs or ice packs used when you receive an injury
e.g. electrolysis
e.g. the reaction between ethanoic acid and sodium carbonate
the thermal decomposition of calcium carbonate
Activation energy is needed in both exo and endothermic reactions. Activatio energy is the amount
of energy/succesful collisions needed to start a reaction
Catalysts help decrease activation energy in industry so more succesfull reactions can happen quicker
Exothermic reactions
they release energy to their surroundings
In an exothermic reaction the temperature of the substance increases
that is because the energy that is being transferred is heat
e.g. burning
e.g. neutralisation reactions between acids and alkalis
e.g the reaction between water and calcium oxide
They can be useful in technology such as hand warmers and self heating cans
Activation energy is needed in both exo and endothermic reactions. Activatio energy is the amount of energy/succesfull collisions needed to start a reaction
Catalysts help decrease
activation energy in
industry so more
succesfull reactions can
happen quicker