dimecres, 2 de febrer de 2011


Hello everyone, It would be a pleasure for us to write your opinion about Antoine Lavoisier.
We hope you.
Thank you very much. A big hug.
Tania and Carlos

divendres, 28 de gener de 2011

Video and questions about the video

1- Who is Antoine Lavoisier?
2- What law did  he invent?
3-Apart of the chemistry, what did he do?
4- What was the conclusion of the comission about the animal magnetims?
5- What happened when Antoine Lavoisier ended his career?

Questions about Antoine Lavoisier

1- Where was  Antoine Lavoisier born?
2- What prize did he win in Paris?
3- What was his wife's name?
4- Who translated and ilustrated his books from English  ?
5- What did he demonstrate with phosphorous and sulfur?
6- What did he demonstrate in 1778?
7- What was demonstrated in the book Reflexions sur le Phlogistique?
8- What instrument did he and Laplace use?
9- What did Lavoiser and Laplace discover?
10- How did he die?

Synonyms and antonyms

Write synonyms of these words.     Write antonyms of these words.
Prize                                                       Modern
Demostrate                                             Young
Instrument                                               Beautiful
Experiment                                              Same
Discover                                                  Impossible

divendres, 21 de gener de 2011


Antoine Lavoisier (1743-1794)
French chemist who, through a conscious revolution, became the father of modern chemistry. As a student, he stated "I am young and avid for glory." He was educated in a radical tradition, a friend of Condillac and read Maquois's dictionary. He won a prize on lighting the streets of Paris, and designed a new method for preparing saltpeter. He also married a young, beautiful 13-year-old girl named Marie-Anne, who translated from English for him and illustrated his books. Lavoisier demonstrated with careful measurements that transmutation of water to earth was not possible, but that the sediment observed from boiling water came from the container. He burnt phosphorus and sulfur in air, and proved that the products weighed more than he original. Nevertheless, the weight gained was lost from the air. Thus he established the Law of Conservation of Mass.
Repeating the experiments of Priestley he demonstrated that air is composed of two parts, one of which combines with metals to form calxes. However, he tried to take credit for Priestley's discovery. This tendency to use the results of others without acknowledgment then draw conclusions was characteristic of Lavoisier. In Considérations Générales sur la Nature des Acides (1778), he demonstrated that the "air" responsible for combustion was also the source of acidity. The next year, he named this portion oxygen (Greek for acid-former), and the other azote (Greek for no life). He also discovered that the inflammable air of Cavendish which he termed hydrogen (Greek for water-former), combined with oxygen to produce a dew, as Priestley had reported, which appeared to be water.
In Reflexions sur le Phlogistique (1783), Lavoisier showed the phlogiston theory to be inconsistent. In Methods of Chemical Nomenclature (1787), he invented the system of chemical nomenclature still largely in use today, including names such as sulfuric acid, sulfates, and sulfites. His Traité Élémentaire de Chimie (Elementary Treatise of Chemistry, 1789) was the first modern chemical textbook, and presented a unified view of new theories of chemistry, contained a clear statement of the Law of Conservation of Mass, and denied the existence of phlogiston. In addition, it contained a list of elements, or substances that could not be broken down further, which included oxygen, nitrogen, hydrogen, phosphorus, mercury, zinc, and sulfur. His list, however, also included light, Eric Weisstein's World of Physics and caloric, Eric Weisstein's World of Physics which he believed to be material substances. In the work, Lavoisier underscored the observational basis of his chemistry, stating "I have tried...to arrive at the truth by linking up facts; to suppress as much as possible the use of reasoning, which is often an unreliable instrument which deceives us, in order to follow as much as possible the torch of observation and of experiment." Nevertheless, he believed that the real existence of atoms was philosophically impossible. Lavoisier demonstrated that organisms disassemble and reconstitute atmospheric air in the same manner as a burning body.
With Laplace, used a calorimeter to estimate the heat evolved per unit of carbon dioxide produced. They found the same ratio for a flame and animals, indicating that animals produced energy by a type of combustion. Lavoisier believed in the radical theory, believing that radicals, which function as a single group in a chemical reaction, would combine with oxygen in reactions. He believed all acids contained oxygen. He also discovered that diamond is a crystalline form of carbon. Lavoisier made many fundamental contributions to the science of chemistry. The revolution in chemistry which he brought about was a result of a conscious effort to fit all experiments into the framework of a single theory. He established the consistent use of chemical balance, used oxygen to overthrow the phlogiston theory, and developed a new system of chemical nomenclature. He was beheaded during the French revolution.


Date: Friday

To: 1st of Analysis and Quality Control

From: Carlos and Tania

Subject: Invitation to view our Blog

This memo is to advise you that we have created a blog about Antoine Lavoisier, a great scientist of the 18th century. This blog is intended for students of 1st of Analysis and Quality Control.

We hope you like it. You can write your comments on the blog to express your opinion.

Carlos & Tania.