Best answer
Making bonds
People also ask
Why do exothermic reactions release heat?
Why do exothermic reactions release heat? Exothermic reactions convert chemical energy (enthalpy) inside chemical substances into heat energy. The chemical energy decreases, and the heat energy increases (total energy is conserved).
What is the difference between exothermic and endothermic reactions?
Exothermic reactions are accompanied by an increase in temperature of the reaction mixture. Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.
How do you know if a reaction is exothermic?
If the reaction is exothermic, it means that the total energy it took to break the bonds is less than the total energy released when forming new bonds — so net energy is released in the form of heat. for example 2 H 2 + O2 —- 2 H 2 0 which is exothermic reaction.
What type of chemical reaction releases energy?
Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products than is used to break the bonds in the reactants. Exothermic reactions are accompanied by an increase in temperature of the reaction mixture.
