What does an exothermal reaction involve?

An exothermic reaction is characterized by the release of heat energy into the surrounding environment. During this type of chemical reaction, the total energy of the reactants is higher than that of the products, leading to the excess energy being expelled as heat. This process often results in an increase in temperature of the surroundings, which can be observed in various chemical reactions, such as combustion.

Understanding exothermic reactions is essential in both chemistry and various applications in surgical practices where heat management and thermal interactions may play a critical role. While options suggesting absorption of heat, formation of gas, or production of light might pertain to different types of reactions or physical changes, they do not accurately represent the defining feature of exothermic reactions, which is the release of heat.