BIOMOLECULES AND ENZYMES

Detailed explanation-1: -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.

Detailed explanation-2: -During an exotherMIC reaction, energy is constantly given off, often in the form of heat. During combustion, a substance burns as it combines with oxygen, releasing energy in the forms of heat and light. If the energy produced in an Exothermic Reaction is released as heat, it results in a rise in temperature.

Detailed explanation-3: -Endothermic reactions absorb energy, and exothermic reactions release energy. The law of conservation of energy states that matter cannot be created or destroyed. Whether a chemical reaction absorbs or releases energy, there is no overall change in the amount of energy during the reaction.

Detailed explanation-4: -In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants. For this reason, the change in enthalpy, H, for an exothermic reaction will always be negative.

Detailed explanation-5: -Energy released or stored in a reaction will often be expressed written as H, or a change in enthalpy. A positive H means that energy is stored and the reaction is endothermic. A negative H means that energy is released and the reaction is exothermic.