HIST Seth Rasmussen  Tuesday, March 29, 2011 

18 - Avogadro, his hypothesis, and his number

Carmen J Giunta Department of Chemistry and Physics, Le Moyne College, Syracuse, NY, United States

In 1811, Amedeo Avogadro published a proposal that reconciled John Dalton's atomic theory with Joseph-Louis Gay-Lussac's observations abut the combining volumes of gases. Although Avogadro was not alone in this insight, his proposal did not win widespread acceptance for several decades. Today we call this hypothesis Avogadro's law, that equal volumes of gases under the same temperature and pressure contain equal numbers of molecules. Avogadro never had any idea of what that number is, but the number of fundamental entities in the SI base unit mole is now named after him. This presentation will touch on Avogadro's life, his hypothesis, and the constant named after him.

Monday, March 28, 2011 08:00 PM
Sci-Mix (08:00 PM - 10:00 PM)
Location: Anaheim Convention Center
Room: Hall B

Tuesday, March 29, 2011 08:35 AM
What's In a Name? Histories of Units and Constants (08:30 AM - 11:50 AM)
Location: Disney's Paradise Pier Hotel
Room: Disney's Paradise Pier,Redondo


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