There is a basic difference between the mechanism and the process of exothermic and endothermic reactions. In the case of exothermic reactions, the particular system and the reactants of the system release heat into the surroundings and it cools down. In the case of endothermic reactions, the entire system and the reactants gain heat from the surrounding area and hence the system gets warmed up.
What is an Exothermic Reaction?A reaction that is chemical in nature and is characterized by the release of energy in the form of heat or light is called an exothermic reaction. Matching a light using a matchstick is one example of this type of reaction where the release is in the form of both heat and light.
Compared to an endothermic reaction, where energy is absorbed, the exothermic reaction leads to the release of energy. This energy is often higher than the combined energy of the reactants. In the above example of the matchstick, the flame produced as a result of matching gives out higher energy than compared to the potential energy of the matchstick.
The energy dissipated in an exothermic reaction is transferred into the surroundings. Therefore, the change in enthalpy (a quantity that measures the heat content of a system by calculating the change in energy) is negative in such a reaction.
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Answer:
There is a basic difference between the mechanism and the process of exothermic and endothermic reactions. In the case of exothermic reactions, the particular system and the reactants of the system release heat into the surroundings and it cools down. In the case of endothermic reactions, the entire system and the reactants gain heat from the surrounding area and hence the system gets warmed up.
What is an Exothermic Reaction?A reaction that is chemical in nature and is characterized by the release of energy in the form of heat or light is called an exothermic reaction. Matching a light using a matchstick is one example of this type of reaction where the release is in the form of both heat and light.
Compared to an endothermic reaction, where energy is absorbed, the exothermic reaction leads to the release of energy. This energy is often higher than the combined energy of the reactants. In the above example of the matchstick, the flame produced as a result of matching gives out higher energy than compared to the potential energy of the matchstick.
The energy dissipated in an exothermic reaction is transferred into the surroundings. Therefore, the change in enthalpy (a quantity that measures the heat content of a system by calculating the change in energy) is negative in such a reaction.
Answer:
A reaction that is characterized by the release of energy in the form of heat or light is called an exothermic reaction.
EXAMPLES :-
1) Reaction of barium hydroxide and ammonium chloride. Ba(OH)2 + 2 NH4Cl → 2 NH4OH + BaCl2
2) Photosynthesis.
6 CO2+ 6 H2O + sunlight → C6H12O6 + 6 O2
3) Snow Formation in Clouds
4) Burning of a Candle
5) Rusting of Iron
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