Decompose temperature

If the gas phase activity of the host is controlled by the presence of a pure condensed phase, solid or liquid, the equilibrium between host and guest in a stoichiometric clathrate can be described in terms of the gas phase pressure of the guest. This is, in effect, a vapor pressure for the guest. At higher pressures the guest will condense to form clathrate, and at lower pressures the clathrate will decompose. Temperature variation of this pressure will follow the Clapeyron equation which, with the usual assumptions (ideal gas behavior of the vapor and negligible volume of the condensed phase), reduces to the Clausius-Clapeyron equation ... 

Lecithins decompose at extreme pH. They are also hygroscopic and subject to microbial degradation. When heated, lecithins oxidize, darken, and decompose. Temperatures of 160-180°C will cause degradation within 24 hours. 

In the case of a low heat of formation, such as gold, the surface formate is very unstable at the decomposing temperatures. This results in slow overall reaction rate. With increasing stability of the surface formate, the reaction rate becomes faster until it reaches an optimum stability. If the surface formate is too stable, the catalyst surface is covered by the stable surface formate. The reaction rate, on the other hand, becomes slower, as the surface formate decomposes with difficulties, while the overall reaction becomes zero-order, the surface being saturated with formate. In this way a volcano-shaped curve was obtained in a plot of catalyst activity versus heat of formation of metal formates. It is thus easily realized that the state of the catalyst surface during the decomposition depends upon the nature of the catalyst. 

EXPLOSION and FIRE CONCERNS combustible solid, but bums with difficulty NFPA rating (NA) toxic gases and vapors, such as hydrogen chloride, carbon monoxide, and phosgene gases may be released when 2,4,5-T decomposes temperatures above 158°C (316°F) may cause sealed metal containers to burst use water, dry chemicals, foam, or carbon dioxide for firefighting purposes. 

The CFBDH possessed uniformly spherical coreshell structure with an average diameter of 126 nm. CFBDH had two TgS of -39.2 and 29.6 °C, which represented the Tg of the core phase and the shell phase of the CFBDH, respectively. The SFBDH only had one Tg, 12.8 °C, which indicated the presence of random structures of SFBDH. The thermal stabilities were thus enhanced by the introduction of fluorine-containing monomer compared with fluorine-free polyacrylate CBDH. The initial and complete decomposing temperatures of fluorine-free polyacrylate emulsion film, CBDH, were 307 and 406 °C, respectively. The SFBDH film decomposed between 322 and 413 °C, which indicated that the thermal stabilities of the CFBDH and SFBDH... 

KCIO3. Not very soluble in water, deposited from chlorate(V) solutions (CI2 plus Ca(OH)2 or electrolysis of aqueous NaCl). On heating gives KCl and KCIO4 but decomposes to KCl at high temperatures. 

The other halides dissociate at lower temperatures and, if put into water, all are decomposed, the proton transferring to water which is a better electron pair donor ... 

Arsenic (but not antimony) forms a second hydride. This is extremely unstable, decomposing at very low temperatures. Replacement of the hydrogen atoms by methyl groups gives the more stable substance tetramethyldiarsane, cacodyl, (CH3)2As -AsfCHj), a truly foul-smelhng liquid. 

Very small quantities of bismuthine are obtained when a bismuth-magnesium alloy, BijMgj, is dissolved in hydrochloric acid. As would be expected, it is extremely unstable, decomposing at room temperature to bismuth and hydrogen. Alkyl and aryl derivatives, for example trimethylbismuthine, Bi(CHj)3, are more stable. 

It is slightly soluble in water, giving a neutral solution. It is chemically unreactive and is not easily oxidised or reduced and at room temperature it does not react with hydrogen, halogens, ozone or alkali metals. However, it decomposes into its elements on heating, the decomposition being exothermic ... 

The nitrous acid decomposes rapidly at room temperature, thus 3HNO2 HNO3 + 2NO + H2O (9.2)... 

It decomposes exothermically to oxygen, a reaction which can be explosive. Even dilute ozone decomposes slowly at room temperature the decomposition is catalysed by various substances (for example manganese(IV) oxide and soda-lime) and occurs more rapidly on heating. 

Pure hydrogen peroxide is a colourless, viscous liquid, m.p. 272.5 K, density l,4gcm . On heating at atmospheric pressure it decomposes before the boiling point is reached and a sudden increase of temperature may produce explosive decomposition, since the decomposition reaction is strongly exothermic ... 

When chlorine is passed over molten sodium or potassium hydroxide, oxygen is evolved, the high temperature causing the chlorate V) ion to decompose ... 

It is a dark brown liquid, m.p. 256 K, which decomposes rapidly at room temperature. 

It is a liquid, b,p. 363 K, but if heated it decomposes and hence must be distilled under reduced pressure decomposition may occur with explosive violence and this can occur even at room temperature if impurities are present. Combustible material, for example paper and wood, ignite spontaneously with explosive violence on contact with the acid, and it can produce painful blisters on the skin,... 

Addition of aqueous cyanide ion to a copper(II) solution gives a brown precipitate of copper(II) cyanide, soluble in excess cyanide to give the tetracyanocuprate(II) complex [Cu(CN)4] . However, copper(II) cyanide rapidly decomposes at room temperature, to give copper(I) cyanide and cyanogen(CN)2 (cf. the similar decomposition of copper(II) iodide, below) excess cyanide then gives the tetracyanocuprate(I) [Cu(CN)4] . 

When a mixture of anhydrous glycerol and crystalline oxalic acid, (C00H)2,2H lO, is heated the glycerol undergoes esterification, givang first glyceryl monoxalate (A) the latter, however, decomposes as the temperature... 

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