Answers

2015-06-03T13:03:38+05:30
Reaction in which heat energy is liberated by the reactants is called exothermic reaction.
  eg:   Carbon + Oxygen gives  Carbon Dioxide + Q

reaction in which heat energy is absorbed by the reactants is called endothermic reaction.
eg:  Nitrogen + Oxygen gives 2 nitrous oxide (2NO)  -  Q
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