Sadi Carnot (1873) - Photographie Franck
Sadi Carnot may refer to: *Nicolas Léonard Sadi Carnot (1796–1832), French physicist, the ''father of thermodynamics'' *Marie François Sadi Carnot Marie François Sadi Carnot (; 11 August 1837 – 25 June 1894) was a French statesman who served as President of France from 1887 until his assassination in 1894. His presidency was marked by a series of poorly handled crises. General Boula ...

Nicolas Léonard Sadi Carnot
Nicolas Léonard Sadi Carnot (; 1 June 1796 – 24 August 1832) was a French people, French military engineering, military engineer and physicist. A graduate of the École polytechnique, Carnot served as an officer in the Engineering Arm (''le génie'') of the French Army. He also pursued scientific studies and in June 1824 published an essay titled ''Reflections on the Motive Power of Fire''. In that book, which would be his only publication, Carnot developed the first successful theory of the Thermal efficiency, maximum efficiency of heat engines. Carnot's scientific work attracted little attention during his lifetime, but in 1834 it became the object of a detailed commentary and explanation by another French engineer, Émile Clapeyron. Clapeyron's commentary in turn attracted the attention of William Thomson, 1st Baron Kelvin, William Thomson (later Lord Kelvin) and Rudolf Clausius. Thomson used Carnot's analysis to develop an absolute thermodynamic temperature scale, whi ...
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