Energy may be defined as the capability or capacity to produce work. It is contained in all matter and while it exists in many different forms, these forms, however, are well defined. Because matter is anything that possesses mass and occupies space, energy is related to mass. Moreover, we may note that Einstein’s theory of relativity suggests that mass, m, may be converted to energy, E , (and energy may be converted to mass) via

E = mc2

where c = 2.9997 × 108 m/s is the speed of light. However, for all energy-mass interactions other than nuclear reactions, the amount of mass converted to energy is extremely small and can be neglected. Thus, in this study, we state the conservation of mass principle that is often quoted in subsequent discussions as

Mass can neither be created nor destroyed and its composition cannot be altered from one form to another unless it undergoes a chemical change.