Separation of Reactive Chemicals

Just as molecule A can change into molecule B without any added energy, there are other molecules that can change from one form to another with no added energy. These molecules are often called "reactive" molecules. When molecules that are reactive have the chance to combine with a neighboring molecule to form a more stable molecule they usually do so.

Below is a movie that shows two reactive molecules combining as soon as they come in contact with each other. The beakers contain two different gases that are separated from each other by a divider. When the divider is removed the gases react immediately to form a new, brown gas. Double click on the video to see it again!