Combustion reactions can only be exothermic. In chemical reactions, old bonds are broken to form new ones. Depending on the energy difference between broken and formed bonds, the total reaction energy is either positive ... More » Science Chemistry

Combustion reactions have a variety of uses including the burning of fuel that provides heat for the home or power for an automobile. Combustion of natural gas or propane gives the heat to cook one's food. Combustion of ... More » Science Chemistry

Freezing water is an exothermic process because there is a release of energy into the environment in the form of heat. In an exothermic reaction, the change in enthalpy or measure of heat content, is negative. More » Science Chemistry
similar articles

Examples of exothermic processes include burning of coal, rust formation and dissolution of quick lime in water. On the other hand, some endothermic processes include dissolution of Ammonium Chloride in water and nitric ... More » Science Chemistry

During endothermic reactions, energy is absorbed from the surrounding environment. The energy is typically transferred in the form of heat energy, and causes the reaction mixture and its environs to cool. A thermometer c... More » Science Chemistry

The difference between exothermic and endothermic reactions is found in their names: "endo" means to draw into itself, whereas "exo" means to emit. All chemical reactions either release or use energy, which can be in the... More » Science Chemistry Atoms & Molecules

The difference between exergonic and exothermic reactions is that energy is released to the surroundings in an exergonic reaction. When an exothermic reaction occurs, the energy released to the surroundings is heat energ... More » Science Chemistry