ويليام جيوك
وليام جيوك | |
|---|---|
William Giauque | |
 | |
| وُلِدَ | 12 مايو 1895 |
| توفي | مارس 28, 1982 (aged 86) |
| الجنسية | أمريكي |
| المدرسة الأم | جامعة كاليفورنيا، بركلي |
| الجوائز | Elliott Cresson Medal (1937) Nobel Prize for Chemistry (1949) Willard Gibbs Award (1951) |
| السيرة العلمية | |
| المجالات | كيمياء فيزيائي |
| الهيئات | جامعة كاليفورنيا، بركلي |
| المشرف على الدكتوراه | George Ernest Gibson, گلبرت ن. لويس |
وليام فرانسيس جيوك (William Francis Giauque ؛ /dʒiˈoʊk/؛[1] ولد في 12 مايو 1895 بمدينة شلالات نياگرا، أونتاريو الكندية وتوفي في 28 مارس 1982. ولد لأبوين أمريكيين كان يعيشان في كندا ثم عادا إلى الولايات المتحدة. درس في ميشيگان.
حصل على جائزة نوبل في الكيمياء لسنة 1949 لعمله على خصائص المادة عند اقتراب حررارتها من الصفر المطلق.
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السيرة
William Francis Giauque was born in Niagara Falls, Ontario, on May 12, 1895.
As his parents were U.S. citizens, they returned to the U.S. where he attended public schools primarily in Michigan. Following the death of his father in 1908, the family returned to Niagara Falls, where he studied at the Niagara Falls Collegiate Institute. After graduation, he looked for work in various power plants at Niagara Falls both for financial reasons and to pursue a career in electrical engineering. He was widely unsuccessful.
Eventually, however, his application was accepted by the Hooker Electro-Chemical Company in Niagara Falls, New York, which led him to employment in their laboratory. He enjoyed the work, and decided to become a chemical engineer.
After two years of employment, he entered the College of Chemistry of the University of California, Berkeley, where he received a Bachelor of Science degree with honors in 1920. He entered graduate school at Berkeley, becoming a University Fellow (1920–1921) and a James M. Goewey Fellow (1921–1922). He received the Ph.D. degree in chemistry with a minor in physics in 1922.
الأبحاث
Although he began university study with an interest in becoming an engineer, he soon developed an interest in research under the influence of Professor Gilbert N. Lewis. Due to his outstanding performance as a student, he became an instructor of chemistry at Berkeley in 1922 and after passing through various grades of professorship, he became a full professor of chemistry in 1934. He retired in 1962.
الصفر المطلق
He became interested in the third law of thermodynamics as a field of research during his experimental research for his Ph.D. research under Professor George Ernest Gibson comparing the relative entropies of glycerine crystals and glass.
The principal objective of his researches was to demonstrate through range of appropriate tests that the third law of thermodynamics is a basic natural law. In 1926, he proposed a method for observing temperatures considerably below 1 Kelvin (1 K is −457.87 °F or −272.15 °C). His work with D.P. MacDougall between 1933 and 1935 successfully employed them.
He developed a magnetic refrigeration device of his own design in order to achieve this outcome, getting closer to absolute zero than many scientists had thought possible. This trailblazing work, apart from proving one of the fundamental laws of nature led to stronger steel, better gasoline and more efficient processes in a range of industries.
His research and that of his students included a large number of entropy determinations from low temperature measurements, particularly on condensed gases. The entropies and other thermodynamic properties of many gases were also determined from quantum statistics and molecular energy levels available from band spectra as well as other sources.
His correlated investigations of the entropy of oxygen with Dr. Herrick L. Johnston, led to the discovery of oxygen isotopes 17 and 18 in the Earth's atmosphere and showed that physicists and chemists had been using different scales of atomic weight for years without recognising it.
الحياة الشخصية
In 1932, Giauque married Dr. Muriel Frances Ashley and they had two sons. He died on March 28, 1982, in Berkeley, California.
المصادر
- Shampo, Marc A; Kyle, Robert A; Steensma, David P (2006). "Stamp vignette on medical science. William F. Giauque—Nobel Prize for low-temperature research". Mayo Clin. Proc. Vol. 81, no. 5 (published 2006 May). p. 587. doi:10.4065/81.5.587. PMID 16706253.
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وصلات خارجية
- [1] National Academy of Sciences biography
- [2] William Giauque Nobel Prize biography
- [3] contributions in the field of chemical thermodynamics, particularly concerning the behaviour of substances at extremely low temperatures.
- M. A. Shampo, R. A. Kyle, D. P. Steensma (2006). "William F. Giauque—Nobel Prize for Low-Temperature Research". Mayo Clinics Proceedings. 81 (5): 587. doi:10.4065/81.5.587.
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- ^ The Columbia Electronic Encyclopedia, 2004.