Plot a represents an exothermic reaction. In an exothermic process, the bonds in the product molecules are stronger (on average) than those in the reactant molecules. The net result is that the quantity of energy Δ(PE) is transferred to the surroundings as heat when reactants are converted to products.

Which does represent an exothermic reaction?

The exothermic reaction is defined as the reaction where the energy is released by the system. The enthalpy change of exothermic reaction is less than zero. ΔH<0. The example for the exothermic reaction is the combustion of glucose.

Which reaction is exothermic a reaction?

An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat. All combustion reactions are exothermic reactions.