---
title: "Antoine Lavoisier"
chunk: 7/8
source: "https://en.wikipedia.org/wiki/Antoine_Lavoisier"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:07:05.583915+00:00"
instance: "kb-cron"
---

The relationship between combustion and respiration had long been recognized from the essential role which air played in both processes. Lavoisier was almost obliged, therefore, to extend his new theory of combustion to include the area of respiration physiology. His first memoirs on this topic were read to the Academy of Sciences in 1777, but his most significant contribution to this field was made in the winter of 1782–1783 in association with Laplace. The result of this work was published in a memoir, "On Heat." Lavoisier and Laplace designed an ice calorimeter apparatus for measuring the amount of heat given off during combustion or respiration. The outer shell of the calorimeter was packed with snow, which melted to maintain a constant temperature of 0 °C around an inner shell filled with ice. By measuring the quantity of carbon dioxide and heat produced by confining a live guinea pig in this apparatus, and by comparing the amount of heat produced when sufficient carbon was burned in the ice calorimeter to produce the same amount of carbon dioxide as that which the guinea pig exhaled, they concluded that respiration was, in fact, a slow combustion process. Lavoisier stated, "la respiration est donc une combustion," that is, respiratory gas exchange is a combustion, like that of a candle burning.
This continuous slow combustion, which they supposed took place in the lungs, enabled the living animal to maintain its body temperature above that of its surroundings, thus accounting for the puzzling phenomenon of animal heat. Lavoisier continued these respiration experiments in 1789–1790 in cooperation with Armand Seguin. They designed an ambitious set of experiments to study the whole process of body metabolism and respiration using Seguin as a human guinea pig in the experiments. Their work was only partially completed and published because of the Revolution's disruption, but Lavoisier's pioneering work in this field inspired similar research on physiological processes for generations.

== Legacy ==

Lavoisier's fundamental contributions to chemistry were a result of a conscious effort to fit all experiments into the framework of a single theory. He established the consistent use of the chemical balance, used oxygen to overthrow the phlogiston theory, and developed a new system of chemical nomenclature which held that oxygen was an essential constituent of all acids (which later turned out to be erroneous).
Lavoisier also did early research in physical chemistry and thermodynamics in joint experiments with Laplace. They used a calorimeter to estimate the heat evolved per unit of carbon dioxide produced, eventually finding the same ratio for a flame and animals, indicating that animals produced energy by a type of combustion reaction.
Lavoisier also contributed to early ideas on composition and chemical changes by stating the radical theory, believing that radicals, which function as a single group in a chemical process, combine with oxygen in reactions. He also introduced the possibility of allotropy in chemical elements when he discovered that diamond is a crystalline form of carbon.
He was also responsible for the construction of the gasometer, an expensive instrument he used at his demonstrations. While he used his gasometer exclusively for these, he also created smaller, cheaper, more practical gasometers that worked with a sufficient degree of precision that more chemists could recreate.
Overall, his contributions are considered the most important in advancing chemistry to the level reached in physics and mathematics during the 18th century.
Following his death, a collection comprising most of his scientific manuscripts and instruments was established by his relatives at the Château de la Canière in Puy-de-Dôme.
Mount Lavoisier in New Zealand's Paparoa Range was named after him in 1970 by the Department of Scientific and Industrial Research.

== In popular culture ==
In the Breaking Bad season 5 episode “Say My Name” (episode 7), Walter White tells Todd Alquist, “I don’t need you to be Antoine Lavoisier,” meaning that Todd does not need to be an expert to assist with cooking methamphetamine.

== Awards and honours ==
During his lifetime, Lavoisier was awarded a gold medal by the King of France for his work on urban street lighting (1766), and was appointed to the French Academy of Sciences (1768). He was elected as a member of the American Philosophical Society in 1775.
Lavoisier's work was recognized as an International Historic Chemical Landmark by the American Chemical Society, Académie des sciences de L'institut de France and the Société Chimique de France in 1999. Antoine Laurent Lavoisier's Louis 1788 publication entitled Méthode de Nomenclature Chimique, published with colleagues Louis-Bernard Guyton de Morveau, Claude Louis Berthollet, and Antoine François, comte de Fourcroy, was honored by a Citation for Chemical Breakthrough Award from the Division of History of Chemistry of the American Chemical Society, presented at the Académie des Sciences (Paris) in 2015.

A number of Lavoisier Medals have been named and given in Lavoisier's honour, by organizations including the Société chimique de France, the International Society for Biological Calorimetry, and the DuPont company He is also commemorated by the Franklin-Lavoisier Prize, marking the friendship of Antoine-Laurent Lavoisier and Benjamin Franklin. The prize, which includes a medal, is given jointly by the Fondation de la Maison de la Chimie in Paris, France and the Science History Institute in Philadelphia, PA, USA.

== Selected writings ==