Thermochemical processes involve the study of heat changes that occur during chemical reactions. These processes can either absorb heat, known as endothermic reactions, or release heat, referred to as exothermic reactions. Understanding these heat changes is crucial in fields like chemistry and engineering, as they help predict how substances will behave under different conditions. In practical applications, thermochemical processes are essential in industries such as energy production and materials science. For example, the combustion of fuels releases energy, while the formation of certain compounds may require heat input. By analyzing these processes, scientists can optimize reactions for better efficiency and sustainability.