Regnault, Henri Victor

Regnault, Henri Victor (1810-78)AFrenchsdentistwho was born in poverty and rose to become an outstanding chemist and physicist. He discovered carbon tetrachloride and measured the chemical composition of the atmosphere around the world. He made a series... 

Henri-Victor Regnault, 1810-1878. French chemist and physicist He made precise measurements of specific heats and heats of fusion and vaporization, and of the velocity of sound, and contributed to the theory of organic radicals. Among his students may be mentioned Cannizzaro, Kekule, and Mendeleev. 

The years 1859 to 1861, when the Ministry of Public Instruction sent him abroad to study, shaped Mendeleev s career as a scientist. He studied gas density with the chemist Henri Victor Regnault in Paris and spectroscopy with the physicist Gnstav Kirchhoff in Heidelberg. It was while working in Heidelberg that Mendeleev discovered the principle of critical temperature for gases. Once a gas is heated to a temperature above its critical point, no amount of pressure will turn it into a liqtiid. His work went unnoticed, and the discovery of critical temperatures is usually attributed to the Irish physicist and chemist Thomas Andrews. 

Carbon tetrachloride (CAR-bun tet-ra-KLOR-ide) is a colorless, nonflammable liquid with a sweetish odor and a density 1.5 times that of water. The compound is classified as a halogenated hydrocarbon because all of the hydrogens in methane (CH4), a hydrocarbon, have been replaced by halogen atoms (chlorine, in this case). Carbon tetrachloride was first prepared in 1839 by German-born French chemist Henri Victor Regnault (1810-1878). Regnault made carbon tetra-... 

Polyvinyl chloride is first discovered accidentally by French physicist and chemist Henry Victor Regnault. PVC is rediscovered (again accidentally) in 1926. 

German-born French chemist Henri Victor Regnault first prepares carbon tetrachloride. 

Regnault s method A method used for the determination of the density of gases. A bulb of known volume is evacuated and weighed then the gas is admitted at a known pressure (from a vacuum line) and the bulb weighed again. The temperature is also noted and the data corrected to STP. The method is readily applicable to the determination of approximate relative molecular masses of gaseous samples. The method is named for the French physicist and chemist Henri Victor Regnault (1800-78). 

Inventor Henri Victor Regnault (accidental polymerization), Fritz Klatte (technological developments), Waldo Semon (commercial applications ... 

Regnault s method A technique for measuring gas density by evacuating and weighing a ass bulb of known volume, admitting gas at known pressure, and reweighing. The determination must be carried out at constant known temperature and the result corrected to standard temperature and pressure. The method is named after the French chemist Henri Victor Regnault (1810-78). 

European and American researchers in the nineteenth and early twentieth centuries proposed several coal classification systems. The earliest, published in Paris in 1837 by Henri-Victor Regnault (1810-1878), classified coal types according to their proximate analysis (determination of component substances, by percentage), that is, by their percentages of moisture, combustible matter, fixed carbon, and ash. This system is still favored, in modified form, by many American coal scientists (Speight, 2005). 

Henri Victor Regnault (1810-1878) French physical chemist Paris, France. 

Other contemporaries, Henry Victor Regnault and E. Simon, described polymers of vinyl chloride, vinylidene chloride, styrene and other polymers in 1938 and 1939. However, the most significant contribution to polymer science in the early part of the nineteenth century was made by a blind scientist named John Gough. 

Details Henri Victor Regnault observed that vinyl monomer forms white solid material when exposed to sunlight Klatte worked on processability Semon continued Klatte efforts and succeeded in plasticization extensive commercial applications had to wait on development of thermal stabilizers, which permitted industrial processing during Second World V r in US ... 

Regnault s method A method of measuring the density of a gas involving weighing an evacuated glass bulb of known volume and then admitting the gas at a known pressure and temperature. The method is named after French chemist and physicist Henri Victor... 

---