EXOTHERMIC AND ENDOTHERMIC REACTION

EXOTHERMIC AND ENDOTHERMIC REACTIONS

      During chamical reaction there change in energy which takes place, those energy changes can be either endothemic or exothermic

ENDOTHERMIC REACTIONS

     Endothermic reaction occur when the sum of heat content of products is  less than sum of heat content of products, then reaction will be endothemic reaction. Consider the example below

             P + Q > R+ S

Then if the sum of heat (energy ) content of P and Q (reactants)  are less than that of R and S (products) the extra energy or heat required by products side is absorbed from the surrounding. Such reaction is endothemic reaction.

There fore
           Endothermic reactions are the reactions which absorb energy ( heat) from the surrounding during chemical reaction proceeding.
                                                 

       Example of endothermic reaction are;
     
          1. Dissolving ammonia chloride in water
          2. Mixing water and poassium chloride
          3. Photosynthesis


NB;
   Reversible reaction pocess both endothermic and exothermic reaction, when the forward reaction is exothemic then backward reaction will be endothemic and viceveser.


Exercise.

     1. With aid of energy level diagram explain endothemic reactions.

    2. Give reason why in endothemic reaction aborb energy from the sarounding?

   3. Metion five examples of endothermic reaction.