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Chemical reactions and equations
What does one mean by exothermic and endothermic reactions? Give examples
Exothermic reaction: The exothermic reaction is the chemical reaction in which the energy is released in the form of heat or light. In an exothermic reaction, the energy of the reactants is more than the energy of the products. For example, when methane reacts with oxygen gas, carbon dioxide and water are formed along with the release of heat and light.
CH4 (g) + O2 (g) → CO2 (g) + H2O (l) + Heat + Light
Endothermic reaction: The endothermic reaction is the type of chemical reaction in which the energy is absorbed by the reactants to complete the chemical reaction. In an endothermic reaction, the energy of the products is greater than the energy of the reactants. For example, when nitrogen gas reacts with oxygen gas, nitrogen monoxide is formed along with the absorption of heat.
N2 (g) + O2 (g) + heat → NO (g)
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