EVERYDAY SCIENCE

Detailed explanation-1: -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.

Detailed explanation-2: -Complete answer:-Those reactions in which the reaction absorbs heat energy (thermal energy) from its surroundings and forms products are known as endothermic reactions. When these reactions absorb heat from outside sources they lower the temperature of the surroundings and thus cause a cooling effect.

Detailed explanation-3: -Endothermic reactions: Heat is absorbed.

Detailed explanation-4: -A chemical reaction in which heat is absorbed is called an endothermic reaction.

Detailed explanation-5: -The quantity of heat for a process is represented by the letter q. The sign of q for an endothermic process is positive because the system is gaining heat. A chemical reaction or physical change is exothermic if heat is released by the system into the surroundings.