Anaya Nolan
The Law of Conservation of Mass, also known as the Law of Conservation of Matter, was formulated by French chemist Antoine Lavoisier. Lavoisier's discovery in 1789 that mass is neither created nor destroyed in chemical reactions laid the foundation for modern chemistry and revolutionized science. The concept, however, has its roots in ancient Greek philosophy, with Empedocles and Epicurus expressing similar principles around the 4th and 3rd centuries BCE, respectively. The idea that matter cannot be created or destroyed, only rearranged, has had a significant impact on the study and production of chemical reactions, making chemistry the respectable science it is today.
| Characteristics | Values |
|---|---|
| Name of the scientist who created the law of conservation of matter | Antoine Laurent Lavoisier |
| Year of discovery | 1789 |
| Year of expression of the principle of conservation of mass | 1773 |
| Other names | Antoine-Laurent Lavoisier |
| Nationality | French |
| Profession | Chemist |
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What You'll Learn
Ancient Greek philosophy's influence
The Law of Conservation of Mass was formulated by Antoine Lavoisier in 1773, later dated to 1789. Lavoisier discovered that mass is neither created nor destroyed in chemical reactions, thus laying the foundation for modern chemistry.
Ancient Greek philosophy has been said to have influenced this law. The prevailing narrative in the history of science maintains that the ancient Greeks did not have a concept of a 'law of nature'. However, some ancient Greek philosophers did refer to them as 'laws of nature'. These include Plato, Aristotle, Philo of Alexandria, Nicomachus of Gerasa, and Galen.
Ancient Greek philosophy opened the doors to a particular way of thinking that provided the roots for the Western intellectual tradition. This philosophy is characterised by an explicit preference for reason and rational thought. Proto-scientific explanations of the natural world can be found in the Milesian thinkers, and Democritus posited atoms as indivisible and invisible units that are the basic components of all matter.
The ancient Greeks were theorising about the fundamental constituents of the natural world, and philosophical discussions have embraced various forms of minima, indivisible units, or building blocks. The term atomism is sometimes used to refer to theories explaining changes in the material world by the rearrangement of minute particles of matter. Ancient Greek natural philosophers fall on either side of this divide, with continuum theorists believing that all matter is infinitely divisible, and atomists believing that matter is composed of tiny, unchangeable particles separated by void spaces.
An important idea in ancient Greek philosophy was that "Nothing comes from nothing", so what exists now has always existed, and no new matter can come into existence. This idea is attributed to Empedocles (4th century BCE) and Epicurus (3rd century BCE).
Thus, ancient Greek philosophy, with its emphasis on rational thought and scientific explanations of the natural world, laid the groundwork for the later development of the Law of Conservation of Mass. The influence of ancient Greek philosophy can be seen in the work of Lavoisier, who built upon these early ideas to formulate the universal law of conservation of mass.
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![Elements of chemistry in a new systematic order containing all the modern discoveries. Illustrated by fourteen copperplates. By Mr. Lavoisier. Translated from the French by Robert Kerr [Leather Bound]](https://m.media-amazon.com/images/I/61kelb6mFML._AC_UY218_.jpg)
Lomonosov's formulation
The formulation of the law of conservation of matter, also known as the law of mass/matter conservation, has been attributed to Mikhail Lomonosov, who first outlined the principle in 1748. This law is sometimes referred to as the Lomonosov-Lavoisier law. Lomonosov's formulation was based on general philosophical and materialistic considerations, and he never questioned or tested it. Instead, it served as a foundational principle in his research throughout his life.
The law of conservation of matter is a fundamental principle in physics and chemistry, particularly in closed systems. It implies that in any chemical process or reaction within a closed system, the mass of the reactants must equal the mass of the products. This concept is expressed mathematically in fluid mechanics and continuum mechanics using the continuity equation, which states that the rate of mass flowing into a control volume is equal to the rate of mass flowing out plus the rate of change of mass within the volume.
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Antoine Lavoisier's experiments
The French chemist Antoine Lavoisier is credited with formulating the concept of the conservation of mass, which states that matter can neither be created nor destroyed, only rearranged. This idea laid the foundation for modern chemistry and revolutionized science.
Lavoisier's experiments were characterized by his systematic determination of the weights of reagents and products involved in chemical reactions, including gaseous components. He assumed the validity of the law of conservation of mass during his work and verified it by showing that deductions from the law always showed the assumption to be correct, within experimental error.
Lavoisier assembled a number of experiments, all done in closed vessels, in which the weight remained constant. This included reacting tin or lead with oxygen and analyzing mercury calx (HgO). He also utilized burning lenses that focused the sun's rays to reach the high temperatures necessary for chemical reactions. With these lenses, Lavoisier was able to burn a diamond and show that only carbon dioxide (CO2) was produced.
Lavoisier's experiments disproved the then-popular phlogiston theory, which stated that mass could be gained or lost in combustion and heat processes. The buoyancy effect of the Earth's atmosphere on the weight of gases had obscured the conservation of mass for millennia. For example, a piece of wood weighs less after burning, suggesting that some of its mass has been lost or transformed. However, Lavoisier's careful experiments, performed in sealed glass ampoules, demonstrated that the mass remained constant within a closed system.
Lavoisier's work built upon philosophical speculation and quantitative experimentation that preceded him. For example, in the 4th century BCE, Empedocles stated that "it is impossible for anything to come to be from what is not, and it cannot be brought about or heard of that what is should be utterly destroyed." Similarly, in the 3rd century BCE, Epicurus wrote that "the totality of things was always such as it is now, and always will be." By the 18th century, the principle of conservation of mass during chemical reactions was widely used and assumed, even before a formal definition was established.
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The revolution in science
The Law of Conservation of Mass, or the concept that matter can neither be created nor destroyed, only rearranged, was formulated by French chemist Antoine Lavoisier. Lavoisier's discovery in 1789 that mass remains constant before and after a chemical reaction laid the foundation for modern chemistry and revolutionized science.
The idea that mass is conserved was not new, however. As early as the 4th century BCE, Empedocles wrote that it was "impossible for anything to come to be from what is not, and it cannot be... that what is should be utterly destroyed." This was further supported by Epicurus in the 3rd century BCE, who stated that "the totality of things was always such as it is now, and always will be." By the 18th century, the principle of conservation of mass during chemical reactions was widely used and assumed during experiments, although a more explicit expression of the law can be traced back to Hero of Alexandria.
Lavoisier's experiments disproved the then-popular phlogiston theory, which stated that mass could be gained or lost in combustion and heat processes. Through careful experimentation, Lavoisier demonstrated that mass remains constant in chemical reactions. For example, in the reaction where methane and oxygen are converted into carbon dioxide and water, the number of molecules resulting from the reaction can be derived from the principle of conservation of mass. This concept holds true because naturally occurring elements are very stable on Earth.
The discovery of the law of conservation of mass helped elevate chemistry to the respected science it is today. By applying this law, scientists can predict the amount of product that will be made in a chemical reaction, and chemical manufacturers can increase efficiency in their laboratory practices.
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Foundation of modern chemistry
The foundation of modern chemistry is rooted in the concept of the conservation of mass, also known as the Law of Conservation of Matter. This principle asserts that mass remains constant in a closed system, meaning that matter is neither created nor destroyed. In other words, the mass of a system's reactants will be equal to the mass of its products. This law was formulated by French chemist Antoine Lavoisier in 1789, building upon earlier work by Lomonosov and popularizing the principle.
Lavoisier's experiments disproved the then-prevalent phlogiston theory, which posited that mass could be gained or lost during combustion and heat processes. Through careful experimentation, Lavoisier demonstrated that the mass of a substance before and after a chemical reaction remains the same, even though the substance may appear to disappear. This concept laid the foundation for modern chemistry and revolutionized science.
The idea of the conservation of mass was not entirely new, with ancient Greek philosophers espousing the concept of "Nothing comes from nothing," attributed to Empedocles in the 4th century BCE and further elaborated on by Epicurus in the 3rd century BCE. By the 18th century, the principle of conservation of mass during chemical reactions was widely employed in experiments, and similar sentiments were expressed in Jain philosophy as early as 520 BCE.
The Law of Conservation of Matter has significant implications for various scientific disciplines, including chemistry, mechanics, and fluid dynamics. It allows scientists to quantitatively study the transformations of substances and understand that chemical processes are reactions involving invariant amounts of chemical elements. This law also applies to ecosystems, where the mass balance of elements is crucial for understanding the dynamics of species interactions and ecosystem health. Furthermore, it has practical applications in engineering, where following the mass distribution of a system over time helps solve complex problems.
In summary, the Law of Conservation of Matter, established by Antoine Lavoisier, forms the basis of modern chemistry. It revolutionized our understanding of chemical reactions, facilitated quantitative studies of substance transformations, and found applications across multiple scientific disciplines, thereby shaping the foundation of modern chemistry as we know it today.
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Frequently asked questions
Antoine Lavoisier formulated the concept of the conservation of mass in 1773 and popularized the principle in 1789.
The law of conservation of matter, also known as the law of conservation of mass, states that mass is neither created nor destroyed in chemical reactions.
An example of the law of conservation of mass is when one molecule of methane (CH4) and two oxygen molecules (O2) are converted into one molecule of carbon dioxide (CO2) and two of water (H2O). The number of atoms before and after the reaction remains the same.
The idea that matter cannot be created or destroyed has roots in ancient Greek philosophy, with similar principles expressed by Empedocles in the 4th century BCE and Epicurus in the 3rd century BCE.
Lavoisier conducted a series of experiments, disproving the popular phlogiston theory that mass could be gained or lost in combustion and heat processes. He demonstrated that the mass of an element at the beginning of a reaction is the same as the mass of that element at the end of the reaction.
