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phlogiston    
n. 燃素,熱素

燃素,熱素

phlogiston
n 1: a hypothetical substance once believed to be present in all
combustible materials and to be released during burning

Phlogiston \Phlo*gis"ton\ (fl[-o]*j[i^]s"t[o^]n; 277), n. [NL.,
fr. Gr. flogisto`s burnt, set on fire, fr. flogi`zein to set
on fire, to burn, fr. flo`x, flogo`s, a flame, blaze. See
{Phlox}.] (Old Chem.)
The former hypothetical principle of fire, or inflammability,
regarded by Stahl as a chemical element; it is now known to
be nonexistent.
[1913 Webster PJC]

Note: This was supposed to be united with combustible
(phlogisticated) bodies and to be separated from
incombustible (dephlogisticated) bodies, the phenomena
of flame and burning being the escape of phlogiston.
Soot and sulphur were regarded as nearly pure
phlogiston. The essential principle of this theory was,
that combustion was a decomposition rather than the
union and combination which it has since been shown to
be. This theory is now discredited and superseded by
the theory of chemical reaction between oxidizable
substances and oxidants as an explanation of combustion
[1913 Webster PJC]

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  • Phlogiston theory - Wikipedia
    Phlogiston theory attempted to explain chemical processes such as combustion and rusting, now collectively known as oxidation The theory was challenged by the concomitant mass increase and was abandoned before the end of the 18th century following experiments by Antoine Lavoisier in the 1770s and by other scientists
  • Phlogiston Theory - Science Notes and Projects
    Phlogiston theory is the disproven theory that combustible materials contain a fire-like element called phlogiston Phlogiston theory, once a leading theory in early chemistry, proposed that combustible materials contain a fire-like element called “phlogiston” that gets released during combustion The essence of this theory was that all flammable materials contain this substance, and
  • The Rise and Fall of the Phlogiston Theory of Fire
    By the end of the eighteenth century, however, the Phlogiston theory had been overturned by the new concept of the combustion of oxygen The overthrow of the Phlogiston theory of fire is often presented as a shining example of the triumph of good science over bad, yet the saga is one of many false starts, false experiments, and false assumptions
  • Phlogiston | Antoine Lavoisier, Fire | Britannica
    Phlogiston, in early chemical theory, hypothetical principle of fire, of which every combustible substance was in part composed In this view, the phenomena of burning, now called oxidation, was caused by the liberation of phlogiston, with the dephlogisticated substance left as an ash or residue
  • Phlogiston - Forgotten Realms Wiki
    Phlogiston (pronounced: f l oʊ ˈ dʒ ɪ s t ʌ n flo-JIS-tun[3] listen) was a term that could either refer to the space between the crystal spheres of the Prime Material Plane or to the flammable fluid that permeated it, a rainbow-colored chaotic material that surrounded the spheres Bizarre creatures inhabited it and preyed on spelljammers traveling between spheres [1][4] Spacefarers
  • Stahls Phlogiston Theory | History | Research Starters - EBSCO
    Stahl's Phlogiston Theory Date 1723 Almost forgotten in the twenty-first century, the phlogiston theory proposed by Georg Stahl became the dominant model explaining combustion and fermentation in eighteenth century chemistry Although the theory was later replaced after the discovery of oxygen, the phlogiston theory for a time was the basis for all serious chemical experimentation and research
  • Phlogiston Theory - an overview | ScienceDirect Topics
    Phlogiston theory is defined as a historical scientific concept that posited the existence of a hypothetical substance, called phlogiston, which was believed to be released during combustion and responsible for the process This theory was ultimately rejected in favor of Antoine Lavoisier's theory, which identified oxygen as the key element involved in combustion AI generated definition based
  • Contexts -- Science -- Chemistry -- Phlogiston Theory
    Lavoisier made a symbolic break with phlogiston theory by burning all textbooks that supported the theory, just as Paracelsus had destroyed his copies of the works of the medieval medical authorities His theory of oxidation soon replaced phlogiston theory, and remains a part of modern chemistry
  • Phlogiston Theory
    phlogiston = a combustible "fatty earth" combustible materials released phlogiston into the air when they burned people released phlogiston into the air when they breathed when the air in a container became saturated with phlogiston, combustion or breathing became impossible a comprehensive theory Examples of combustion: charcoal --> ash
  • The Discarded Phlogiston Theory in Early Chemistry - ThoughtCo
    Phlogiston theory was an early explanation for combustion Learn what phlogiston, dephlogistated air, and calx were, and the terms are outdated





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