Fritz Haber
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{{Infobox_Scientist
|name = Fritz Haber
|image = Fritz Haber.png
|imagesize = 180px
|caption = Fritz Haber in 1918.
|birth_date = [[December 9]], [[1868]]
|birth_place = [[Breslau]], [[Germany]] (now [[Wrocław]], [[Poland]])
|nationality = [[Germany]]
|death_date = {{death date and age| 1934|1|29|1868|12|9 }}
|death_place = [[Basel]], [[Switzerland]]
|field = [[Physical chemistry]]
|work_institution = [[ETH Zürich|Swiss Federal Institute of Technology]]<br>[[University of Karlsruhe]]
|alma_mater = [[University of Heidelberg]], [[Humboldt University of Berlin]]<br>[[Technical University of Berlin]]
|doctoral_advisor = [[Robert Bunsen]]
|doctoral_students =
|known_for = [[Fertiliser]]s, [[Explosive]]s, [[Haber process]], [[Haber-Weiss reaction]]
|prizes = [[Nobel Prize for Chemistry]] (1918)
|religion =
|footnotes =
}}
'''Fritz Haber''' ([[9 December]], [[1868]] – [[29 January]], [[1934]]) was a [[List of famous Germany people|German]] [[List of chemists|chemist]], who received the [[Nobel Prize in Chemistry]] in 1918 for his development for [[Haber process|synthesizing ammonia]], important for [[fertilizer]]s and [[explosive]]s. He is also credited as the "father of [[chemical warfare]]" for his work developing and deploying [[chlorine]] and other [[poison gas]]es during [[World War I]].
His wife, [[Clara Immerwahr]], who also held a PhD in chemistry, opposed his work on [[poison gas]] and committed suicide with his service weapon in their garden, possibly in response to his having personally overseen the first successful use of [[chlorine]] at the [[Second Battle of Ypres]] on [[April 22]], [[1915]].<ref name="Hobbes">{{cite book |last=Hobbes |first=Nicholas |title=Essential Militaria |year=2003 |publisher=Atlantic Books |isbn=978-1843542292}}</ref>
He is sometimes credited, incorrectly, with first synthesizing [[MDMA]].<ref>{{cite web
| url = http://www.erowid.org/ask/ask.php?ID=3104
| title = ...MDMA was actually first synthesized by Fritz Haber in 1892...
| publisher = Ask Erowid}}</ref><ref name="Benzenhöfer">Benzenhöfer, U. and Passie, T. (2006): ''Zur Frühgeschichte von Ecstasy''. In: ''Der Nervenarzt''. Bd. 77, S. 95-99. PMID 16397805 [http://www.mdma.net/mdma.pdf PDF ]</ref>
==Biography==
He was born in [[Breslau]], [[Germany]] (now Wrocław, Poland) to [[Jew]]ish parents. His mother died during childbirth. His father was a well-known merchant in the town. From 1886 until 1891 he studied at the [[University of Heidelberg]] under [[Robert Bunsen]], at the [[University of Berlin]] (today the [[Humboldt University of Berlin]])in the group of [[A. W. Hofmann]], and at the Technical College of Charlottenburg (today the [[Technical University of Berlin]]) under [[Carl Liebermann]]. He married [[Clara Immerwahr]] during 1901. Their son, Hermann was born in 1902. Before starting his own academic career he worked at his father's chemical business and in the [[ETH Zürich|Swiss Federal Institute of Technology]] in [[Zürich]] with [[Georg Lunge]].
===Nobel Prize===
During his time in [[University of Karlsruhe|Karlsruhe]] from 1894 to 1911, he and [[Carl Bosch]] developed the [[Haber-Bosch process|Haber process]], which is the [[catalytic]] formation of [[ammonia]] from [[hydrogen]] and atmospheric [[nitrogen]] under conditions of high temperature and high pressure.
In [[1918]] he received the [[Nobel Prize in Chemistry]] for this work.
The Haber-Bosch process was a milestone in industrial chemistry, because it divorced the production of nitrogen products, such as [[fertilizer]], [[explosives]] and chemical feedstocks, from natural deposits, especially [[sodium nitrate]] ([[Caliche (mineral)|caliche]]), of which [[Chile]] was a major (and almost only) producer. The sudden availability of cheap nitrogenous fertilizer is credited with averting a [[Malthusian catastrophe]], or population crisis.
He was also active in the research of [[combustion]] reactions, the separation of [[gold]] from sea water, [[adsorption]] effects, and [[electrochemistry]]. A large part of his work from 1911 to 1933 was done at the [[Kaiser Wilhelm Institute for Physical Chemistry and Elektrochemistry]] at [[Dahlem (Berlin)|Berlin-Dahlem]].
===World War I===
Haber played a major role in the development of [[poison gas in World War I|chemical warfare in World War I]]. Part of this work included the development of [[gas mask]]s with absorbent filters. In addition to leading the teams developing [[chlorine]] gas and other deadly gases for use in [[trench warfare]], Haber was on hand personally to aid in its release.
Gas warfare in WW I was, in a sense, the war of the chemists, with Haber pitted against [[France|French]] Nobel laureate chemist [[Victor Grignard]].
His wife, [[Clara Immerwahr]], a fellow chemist, opposed his work on [[poison gas]] and committed suicide with his service weapon in their garden, possibly in response to his having personally overseen the first successful use of [[chlorine]] at the [[Second Battle of Ypres]] on [[April 22]], [[1915]].<ref name="Hobbes"/> She shot herself in the heart on [[May 15]], and died in the morning. That same morning, Haber left for the [[Eastern Front (World War I)|Eastern Front]] to oversee gas release against the [[Russia]]ns.
Haber was a patriotic German who was proud of his service during [[World War I]], for which he was decorated. He was even given the rank of [[Captain]] by the [[Kaiser]], rare for a scientist too old to enlist in military service.
In his studies of the effects of poison gas, Haber noted that exposure to a low concentration of a poisonous gas for a long time often had the same effect (death) as exposure to a high concentration for a short time. He formulated a simple mathematical relationship between the gas concentration and the necessary exposure time. This relationship became known as [[Haber's rule]].
Haber defended gas warfare against accusations that it was inhumane, saying that death was death, by whatever means it was inflicted. During the 1920s, scientists working at his institute developed the [[hydrogen cyanide|cyanide]] gas formulation [[Zyklon B]], which was used as an [[insecticide]], especially as a [[fumigation|fumigant]] in grain stores, and also later, after he left the program, in the Nazi [[Extermination camps in the Holocaust|extermination camps]].<ref>{{cite journal
| author = M. Szöllösi-Janze
| title = Pesticides and war: the case of Fritz Haber
| journal = European Review
| year = 2001
| volume = 9
| issue =
| pages = 97–108
| doi = 10.1017/S1062798701000096 }}
</ref>
===Post-War===
In the 1920s Haber exhaustively searched for a method to extract gold from sea water, and published a number of scientific papers on the subject. However, after years of research, he concluded that the concentration of gold dissolved in sea water was much lower than those concentrations reported by earlier researchers, and that gold extraction from sea water was uneconomic.
In an effort to become more acceptable to a society increasingly hostile toward Jews, Haber converted to Christianity. Despite his newly acquired faith he was forced to leave Germany in 1933 because of Nazi persecution of persons of Jewish ethnicity. His Nobel Prize winning work in chemistry, and subsequent contributions to Germany's war efforts in the form of chemical fertilizers, explosives and poison munitions, were not enough to prevent vilification of his heritage by the [[Nazism|Nazi]] regime. He moved to Cambridge, England, for a few months, and considered a position at the Sieff Research Institute (now the [[Weizmann Institute]]) in [[Rehovot]], in [[Mandate Palestine]], but never settled anywhere permanently. In January 1934, at the age of 65, Fritz Haber died of heart failure in a [[Basel]] hotel, on his way to a Swiss convalescent retreat. He was cremated and his ashes, together with Clara's ashes, were buried in Basel's Hornli Cemetery. <ref> A photograph of their gravestone in Hornli Cemetery, [[Basel]] can be found in the book written by Stolzenberg.</ref> He bequeathed his extensive private library to the Sieff Institute.
Haber's immediate family also left Germany. His second wife, Charlotte, with their two children, settled in England. Haber's son, Hermann, from his first marriage emigrated to the United States during World War II. He committed suicide in 1946. Members of Haber's extended family died in [[concentration camps]]. One of his children, Ludwig ("Lutz") Fritz Haber (1921-2004), became an eminent historian of chemical warfare in World War I, and published a book called ''The Poisonous Cloud'' (1986).<ref>{{cite web
| url = http://www.scs.uiuc.edu/~mainzv/HIST/awards/Dexter%20Papers/HaberDexterBioJJB.pdf
| title = Lutz F. Haber (1921–2004)
| publisher = University of Illinois at Urbana-Champaign}}</ref>
==Dramatic treatment==
A fictional description of Haber's life, and in particular his longtime relationship with [[Albert Einstein]], appears in Vern Thiessen's 2003 play ''Einstein's Gift''. Thiessen describes Haber as a tragic figure who strives unsuccessfully throughout his life to evade both his Jewish ancestry and the moral implications of his scientific contributions.
[[BBC Radio 4]] ''Afternoon Play'' broadcast a play telling the life of Fritz Haber. This is the description from the Diversity Website:
''Bread from the Air, Gold from the Sea'' as another chemical story (R4, 1415, 16 Feb 01). Fritz Haber found a way of making nitrogen compounds from the air. They have two main uses: fertilizers and explosives. His process enabled Germany to produce vast quantities of armaments. (The second part of the title refers to a process for obtaining gold from sea water. It worked, but didn't pay.) There can be few figures with a more interesting life than Haber, from a biographer's point of view. He made German agriculture independent of Chilean [[saltpetre]] during the Great War. He received the Nobel Prize for Chemistry, yet there were moves to strip him of the award because of his work on gas warfare. He pointed out, rightly, that most of Nobel's money had come from armaments and the pursuit of war. After Hitler's rise to power, a "grateful" government forced Haber to resign from his professorship and research jobs because he was non-Aryan.
==Notes==
<references />
==Further reading==
*Daniel Charles, ''Master mind: The Rise and Fall of Fritz Haber, the Nobel Laureate Who Launched the Age of Chemical Warfare'' (New York: Ecco, 2005), ISBN 0-06-056272-2.
*Dietrich Stoltzenberg, ''Fritz Haber: Chemist, Nobel Laureate, German, Jew: A Biography'' (Chemical Heritage Foundation, 2005), ISBN 0-941901-24-6.
*Vaclav Smil, ''Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production'' (2001) ISBN 0-262-19449-X
== External links ==
* [http://www.nobel.se/chemistry/laureates/1918/haber-bio.html Nobel e-Museum - Biography of Fritz Haber]
* [http://www.haberfilm.com/ HABER - The Definitive Biographical Film about Fritz Haber]
* [http://www.danielcharles.us/haberphotos.html Photographs of Fritz Haber's life]
* [http://www.fhi-berlin.mpg.de/~brich/Friedrich_HaberArticle.pdf A short biography of Fritz Haber, by Bretislav Friedrich]
* [http://www.britannica.com/nobelprize/article-9038696 Encyclopedia Britannica: Nobel Prizes - Fritz Haber]
* [http://nobelprize.org/nobel_prizes/chemistry/laureates/1918/haber-lecture.pdf "The Synthesis of Ammonia from its Elements", Nobel Lecture, June 2, 1920]
{{Nobel Prize in Chemistry Laureates 1901-1925}}
{{BD|1868|1934|Haber, Fritz}}
[[Category:Chemical engineers]]
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