Pierre Louis Dulong, French Chemist
Pierre Louis Dulong (1785-1838) was a French physicist and chemist, remembered today largely for the law of Dulong and Petit. He worked on the specific heat capacity and the expansion and refractive indices of gases. In chemistry, he contributed to knowledge on: the double decomposition of salts (1811), nitrous acid (1815), the oxides of phosphorus (1816), the oxides of nitrogen and catalysis by metals (1823, with Th̩nard). He made the first precise comparison of the mercury and air-temperature scales. At the time of his death, he was working on the development of precise methods in calorimetry. He is one of the names of 72 scientists inscribed on the Eiffel Tower.
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