- Hess's law of heat summation
- <phys> ■ Heß'sches Gesetz n ; heßsches Gesetz n ; Heß'scher Satz m ; heßscher Satz m
English-german technical dictionary. 2013.
Hess's law of heat summation
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Hess's law of heat summation — ▪ chemistry rule first enunciated by Germain Henri Hess (Hess, Germain Henri), a Swiss born Russian chemist, in 1840, stating that the heat absorbed or evolved in any chemical reaction is a fixed quantity and is independent of the path of… … Universalium
Hess's law — is a law of physical chemistry named for Germain Hess s expansion of the Hess Cycle and used to predict the enthalpy change and conservation of energy (denoted as state function ΔH) regardless of the path through which it is to be… … Wikipedia
reaction, heat of — Amount of heat that must be added or removed during a chemical reaction to keep all substances involved at the same temperature. If it is positive (heat must be added), the reaction is endothermic; if it is negative (heat is given off), the… … Universalium
Hess, Germain Henri — ▪ Russian chemist born Aug. 7, 1802, Geneva, Switz. died Nov. 30, 1850, St. Petersburg, Russia chemist whose studies of heat in chemical reactions formed the foundation of thermochemistry. After practicing medicine for several years… … Universalium
Hess , Germain Henri — (1802–1850) Swiss–Russian chemist Hess, who was born at Geneva in Switzerland, was taken to Russia as a child by his parents. He studied medicine at the University of Dorpat (1822–25) and started his career by practicing medicine in Irkutsk. In… … Scientists
Germain Henri Hess — Infobox Scientist name = PAGENAME box width = image width =150px caption = PAGENAME birth date = August 7, 1802 birth place = Geneva, Switzerland death date = November 30, 1850 death place = St. Petersburg residence = citizenship = nationality =… … Wikipedia
climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… … Universalium
