And combustion theory

17741October, British chemist.

Prishtel

Visit Paris. At the banquet held in lavoisier, priestley told lavoisier that three months ago, he found a gas with remarkable combustion-supporting effect in the experiment of heating water and silver ash. This information inspired lavoisier, who immediately set about synthesizing and decomposing biscite. Lavoisier was convinced by the experimental facts that it was by no means a fire particle or.

phlogiston

Probably the purest air.

At the end of 1775, priestley published an article about

Oxygen element

Lavoisier suddenly realized that this special substance was a new gas element. Later, he carefully investigated the properties of this new gas element, and confirmed that this element can combine with many nonmetallic substances to generate various acids in addition to combustion-supporting and respiration, so he named this element as

Acidic element

Now, oxygen

chemical symbol

0 is derived from.

Achaean

Acid:

Oxygen.

After a systematic study of oxygen, lavoisier clearly pointed out that air itself is not an element, but a mixture, mainly composed of oxygen and nitrogen.

In 1778, he further pointed out that the combustion process is a combination of combustible substances and oxygen in any case, and combustible substances absorb oxygen and gain weight during combustion. The so-called phlogiston does not actually exist. Lavoisier is about burning.

Oxidation theory

Finally, people realized the essence of combustion and took its place.

Phlogiston theory

The experimental facts of many chemical reactions were explained in a unified way, which laid an important foundation for the development of chemistry.

Water has long been considered as an element. Lavoisier not only synthesized water through experiments, but also decomposed water into oxygen and hydrogen, confirmed the composition of water, and gave an accurate explanation with the oxidation theory. According to the theory of oxidation, lavoisier pointed out in a paper published in 1777 that animals breathe in oxygen and exhale gas.

Oxygen carbonate

, also belongs to the burning phenomenon. He and French scientists

Laplace (Marquis)

1782 designed an ice calorimeter and measured the sum of specific heats of some substances.

Latent heat

.