9 August, birth anniversary Avogadro

9 August, birth anniversary of Avogadro

7:51 AM, 9th August 2014
9 August, birth anniversary of Avogadro
Amedeo Avogadro.

SINGAPORE: Today, August 9, marks the birth anniversary of the famous Italian chemist Amedeo Avogadro. He hypothesized his law, Avogadro’s law, which states that equal volumes of gases, at the same temperature and pressure, contain the same number of molecules. Avogadro’s hypothesis wasn’t generally accepted until after 1858 (after Avogadro’s death).

One of the most important contributions of Avogadro’s work was his resolution of the confusion surrounding atoms and molecules (although he didn’t use the term ‘atom’). Avogadro believed that particles could be composed of molecules and that molecules could be composed of still simpler units, atoms. The number of molecules in a mole (one gram molecular weight) was termed Avogadro’s number (sometimes called Avogadro’s constant) in honor of Avogadro’s theories. Avogadro’s number has been experimentally determined to be 6.023x1023.

Avogadro also astutely reasoned that simple gases were not formed of solitary atoms but were instead compound molecules of two or more atoms. Thus Avogadro was able to overcome the difficulty that Dalton and others had encountered when Gay-Lussac reported that above 100oC the volume of water vapor was twice the volume of the oxygen used to form it. According to Avogadro, the molecule of oxygen had split into two atoms in the course of forming water vapour.

© Worldofchemicals News

 

Reference - http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/the-path-to-the-periodic-table/avogadro.aspx

 

http://chemistry.about.com/od/famouschemists/a/avogadro.htm

0 Comments

Login

Your Comments (Up to 2000 characters)
Please respect our community and the integrity of its participants. WOC reserves the right to moderate and approve your comment.

Related News


WTO upholds ruling against China’s rare earths exports

BERLIN, GERMANY: The World Trade Organization (WTO) has upheld a ruling that China violated trade rules with restrictions on the export of ‘rare ...

Read more
Attempt to develop synthetic catalysts to split water

SAITAMA, JAPAN: Plants use photosynthesis to convert carbon dioxide and water into sugars and oxygen. The process starts in a cluster of manganese, ca ...

Read more
Effects of alcohol on heart and liver

SINGAPORE: Alcohol consumptions has many psycho-social issues. The journey begins with the alcoholic drink slipping past lips, down the oesophagus and ...

Read more
ExxonMobil appoints new Vice President of synthetic fluids & lubricant, Damon Davis

HOUSTON, US: ExxonMobil Chemical Company announced the appointment of Damon A Davis as Vice President of its global synthetic fluids and lubricant bas ...

Read more
AkzoNobel creates fully compostable, recyclable paper cup

AMSTERDAM, THE NETHERLANDS: AkzoNobel has created the world’s first fully compostable and recyclable paper cup, thanks to the company’s ne ...

Read more
Scientists convert used-cigarette butts into energy storage device

LONDON, UK: A group of scientists from South Korea have converted used-cigarette butts into a high-performing material that could be integrated into c ...

Read more
www.worldofchemicals.com uses cookies to ensure that we give you the best experience on our website. By using this site, you agree to our Privacy Policy and our Terms of Use. X