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phlogiston    
n. 燃素,热素

燃素,热素

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 This theory is now discredited and superseded by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
    The phlogiston theory, a superseded scientific theory, postulated the existence of a fire-like element dubbed phlogiston ( f l ɒ ˈ dʒ ɪ s t ən, f l oʊ-,-ɒ n ) [1] [2] contained within combustible bodies and released during combustion
  • 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 Theory - Science Notes and Projects
    Learn about phlogiston theory in chemistry history Discover what phlogiston is and how scientists discovered the true nature of combustion
  • The Discarded Phlogiston Theory in Early Chemistry
    Phlogiston theory was an early chemical theory to explain the process of oxidation, which is the reaction that occurs during combustion and rusting The word "phlogiston" is an Ancient Greek term for "burning up", which in turn derives from the Greek "phlox", which means flame
  • The Rise and Fall of the Phlogiston Theory of Fire
    Phlogiston was the "motive power of fire," the foundation of color, the principle of inflammability, indestructible, and an "extremely subtle matter " It could easily be used to explain observed results in experiments
  • Phlogiston theory - Oxford Reference
    A former theory of combustion in which all flammable objects were supposed to contain a substance called phlogiston, which was released when the object burned The existence of this hypothetical substance was proposed in 1669 by Johann Becher, who called it `combustible earth' (terra pinguis: literally ‘fat earth’)
  • Oxygen vs. Phlogiston - Whats the Difference? | This vs. That
    Oxygen and phlogiston are two contrasting theories that were once believed to explain combustion Oxygen, a colorless, odorless gas, is now known to be the element responsible for supporting combustion and sustaining life In contrast, phlogiston was a hypothetical substance believed to be released during combustion, causing materials to burn
  • Phlogiston – Science-Education-Research
    Phlogiston theory was an early chemical theory of combustion that saw the process of burning as a reaction in which a substance, phlogiston, was released from a combined state Phlogiston theory was widely used by early scientists such as Joseph Priestley and James Hutton
  • Stahls Phlogiston Theory | EBSCO Research Starters
    Stahl's Phlogiston Theory, developed in the early 18th century by German chemist Georg Ernst Stahl, proposed that combustion and fermentation involved the release of an intangible substance called "phlogiston "
  • Phlogiston Definition Meaning - YourDictionary
    Phlogiston definition: A hypothetical substance formerly thought to be a volatile constituent of all combustible substances, released as flame in combustion





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