Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Arrhenius


In the News (Mon 28 May 12)

  
  Arrhenius
Arrhenius began by assisting Edlund in his work on electromotive force measurements in spark discharges but soon moved to an interest of his own.
The fundamental importance of Arrhenius' work was thus made clear, and at the end of 1884 he got a docentship at Uppsala in physical chemistry - the first in Sweden in this new branch of science.
During these years Arrhenius was able to prove the influence of the electrolytic dissociation on the osmotic pressure, the lowering of the freezing point and increase of the boiling point of solutions containing electrolytes.
www.corrosion-doctors.org /Biographies/ArrheniusBio.htm   (492 words)

  
 Svante Arrhenius -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-29)
Arrhenius was born at Vik (also spelled Wik or Wijk), near (A city is east central Sweden north northwest of Stockholm) Uppsala, (A Scandinavian kingdom in the eastern part of the Scandinavian Peninsula) Sweden, the son of Svante Gustav and Carolina Thunberg Arrhenius.
At the age of three, Arrhenius taught himself to read, despite his parents' wishes, and by watching his father's addition of numbers in his account books, became an (The branch of pure mathematics dealing with the theory of numerical calculations) arithmetical prodigy.
In 1889 Arrhenius explained the fact that most reactions require added heat energy to proceed by formulating the concept of (The energy that an atomic system must acquire before a process (such as an emission or reaction) can occur) activation energy, an energy barrier that must be overcome before two molecules will react.
www.absoluteastronomy.com /encyclopedia/s/sv/svante_arrhenius.htm   (883 words)

  
 Arrhenius equation - Wikipedia, the free encyclopedia
The Arrhenius equation predicts the rate of a chemical reaction at a certain temperature, given the activation energy and chance of successful collision of molecules.
The average amount of thermal energy that molecules possess at a certain temperature is equal to RT, where R is the molar gas constant.
It can be seen that either increasing the temperature or decreasing the activation energy (for example through the use of catalysts) will result in an increase in rate of reaction.
en.wikipedia.org /wiki/Arrhenius_equation   (289 words)

  
 panspermia
Arrhenius urged that life in the form of spores could survive in space and be spread from one planetary system to another
He generally avoided the problem of how life came about in the first place by suggesting that it might be eternal, though he did not exclude the possibility of living things generating from simpler substances somewhere in the universe.
The dynamics of a microorganism in space depend on the ratio p/g, where p is the repulsive force due to the radiation pressure of a star and g is the attractive force due to the star's gravitation.
www.daviddarling.info /encyclopedia/P/panspermia.html   (1002 words)

  
 HYLE 6-1 (2000): Book Reviews. Elisabeth Crawford: Arrhenius: From Ionic Theory to the Greenhouse Effect, Canton 1996 ...
Arrhenius was one of the original triumvirate with Wilhelm Ostwald and Jacobus Henricus van’t Hoff, Nernst one of a second generation of physical chemists, although only five years younger than Arrhenius.
Arrhenius’ life can be conveniently divided into three major portions, corresponding to the three major sections in Crawford’s biography: his education and work in solution theory (for which he is most famous), his study of cosmic physics, and his work in immunochemistry (Arrhenius invented the term).
In the theoretical part, Arrhenius explained the results of the first, by introducing the concept of active (conducting) and inactive (non-conducting) molecules, and the activity coefficient, which elaborated on the Clausius-Williamson hypothesis that assumed the molecules were dissociated before the current was applied, and that all ions had the same amount of electricity.
www.hyle.org /journal/issues/6/rev_ramb.htm   (2077 words)

  
 SVANTE AUGUST ARRHENIUS
Arrhenius was born in Wijk, Sweden on February 19, 1859.
Arrhenius obtained a travel grant and worked with Ostwald and Van't Hoff during which time his reputation increased as he clarified the ionic theory to his fellow chemists.
Arrhenius studied reaction rates as a function of temperature, and in 1889 he introduced the concept of activation energy as the critical energy that chemicals need to react.
www.woodrow.org /teachers/ci/1992/Arrhenius.html   (1943 words)

  
 Svante Arrhenius - Biography
Svante August Arrhenius was born on February 19, 1859, the son of Svante Gustaf Arrhenius and Carolina Christina Thunberg.
Arrhenius was elected a Foreign member of the Royal Society in 1911, and was awarded the Society's Davy medal and also the Faraday Medal of the Chemical Society (1914).
Arrhenius was a contented man, happy in his work and in his family life.
nobelprize.org /nobel_prizes/chemistry/laureates/1903/arrhenius-bio.html   (1047 words)

  
 Encyclopedia: Svante Arrhenius   (Site not responding. Last check: 2007-10-29)
Arrhenius wrote more about this in 1903, in a technical book titled Lehrbuch der kosmischen Physik, but the theory received little comment from scientists.
Arrhenius expected CO2 levels to rise at a rate given by emissions at his time.
Svante Arrhenius, 1896b, On the Influence of Carbonic Acid in the Air upon the Temperature of the Ground, The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science [fifth series] April 1896.
www.nationmaster.com /encyclopedia/Svante-Arrhenius   (3005 words)

  
 Arrhenius   (Site not responding. Last check: 2007-10-29)
Svante August Arrhenius was born in Wijk, Sweden on February 19, 1859, the son of Svante Gustaf Arrhenius and Carolina Christina Thunberg.
Arrhenius had the foresight to send copies of his thesis to several international chemists, and a few were impressed with his work, including the young chemists Wilhelm Ostwald and Jacobus Henricus van't Hoff, who were also to become founding fathers of physical chemistry.
The Arrhenius medal of the Swedish Academy of Sciences, 1937, to memorize the discovery of the water dissociation.
chem.ch.huji.ac.il /~eugeniik/history/arrhenius.htm   (2101 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.