Burning a match is a chemical reaction because the reactant, primarily wood, is chemically altered into a different substance, ash. A chemical reaction or change involves one or more reactants having bonds broken or alte... More »

Chemical reactions that release energy are described by Education.com as exothermic reactions, and their equations follow the form: reactants = products + energy. Examples of exothermic reactions are explosions, such as ... More »

A chemical reaction occurs when a cake bakes. The materials in the batter are changed into a different substance. If the cake burns, that is a separate chemical reaction. In fact, any type of burning, such as a piece of ... More »

A substance that undergoes a change in a chemical reaction is called a reactant or reagent. Usually, chemical reactions comprise of the changes that only pertain to the movement of electrons in the forming and breaking o... More »

Increasing the surface area of a substance involved in a chemical reaction exposes more of the material to the reactant, thereby speeding up the reaction process. This is why chemists often use powder, filings and other ... More »

The molecules of one reactant are combined with those of another reactant to form a new substance during a chemical reaction. As the chemical bonds are broken, the positions of electrons change, resulting in a product wi... More »

In chemistry, the limiting reagent is the reactant that is completely consumed in a chemical reaction. When the limiting reagent is gone, no more product can be formed -- and that's how this component earned its name. More »