Wiedemann, Gustav

In fact, "physical chemistry" was a phrase much in use before 1887,4 and as noted in chapter 2, it sometimes was a subject of study, by that very name, among nineteenth-century chemists.5 An independent chair of physical chemistry was created for Kopp at Heidelberg in 1863, and a section for physical chemistry was established in the physical-mathematical faculty at the University of Kharkow in 1864. The first instructional laboratory at a German university was not Ostwald s but his predecessor s at Leipzig, Gustav Wiedemann, whose physical chemistry laboratory was authorized in 1871 to provide a strong basis for the development of a "theoretical chemistry."6... 

Kopp had his chair of physical chemistry at Heidelberg from 1863 on. Another scientist, Gustav Wiedemann, more a physicist than a chemist, had a laboratory at Leipzig starting in 1871. He sought to construct a foundation for general chemistry, which was another name for what became known as physical... 

The fact that the thermal conductivity in a pure metal is dominated by the free electron contribution was Ulustrated in 1853 by Gustav Wiedemann (1826-1899) and Rudolf Franz (1827-1902), who showed that Xei and the electrical conductivity, (Tei, are proportionally related (Wiedemann and Franz, 1853). A few years later Danish physicist Ludvig Lorenz (1829-1891) realized that this ratio scaled hnearly with the... 

Gustav Heinrich Wiedemann, born Oct. 2, 1826, in Berlin, Germany, died Mar. 23, 1899, in Leipzig, Germany. 

Wiedemann-Franz law The ratio of the thermal conductivity of any pure metal to its electrical conductivity is approximately constant at a ven temperature. The law is fairly well obeyed, except at low temperatures. The law is named after Gustav Wiedemarm and Rudolph Franz, who discovered it empirically in 1853. 

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