Dear student,
There are both type of reactions-
Exothermic reaction | Endothermic reaction |
Exothermic reaction are the one in which heat energy is released. So if heat is liberated such reactions are exothermic reactions | Endothermic reaction are the one in which heat energy is absorbed. So if heat is absorbed then we can say that such reactions are endothermic reactions. |
Exo means release | Endo means absorb |
Delta H is negative ( delta H = HP - HR) | Delta H is positive |
Energy of reactant is more than the product | Energy of product is more than reactant |
Ex., Photosynthesis, evaporation | Ex., Respiration, combustion |