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Fluorine combustion calorimetry reaction

Much of the discussion of oxygen flame calorimetry presented in section 7.3 is directly applicable to fluorine flame calorimetry. As in the case of bomb calorimetry, however, the special properties of fluorine combustion systems and problems associated with handling fluorine require a somewhat different experimental method [109,115,116]. Thus, for example, a metal burner should be used. Also, the fact that the mixing of many gases with F2 may lead to spontaneous ignition hinders the use of a premixed flame. Fluorine combustion calorimetry has been used to study the thermochemistry of important reactions, such as... [Pg.123]

The second law results from the study in [86VIK/GOR] are obviously in error. Fluorine combustion calorimetry was used in a careful study by O Hare, Tasker, and Tarascon [870HA/TAS] to determine the enthalpy of formation of MoSe2(cr) from the reaction... [Pg.346]

In combustion calorimetry [47,48] the enthalpies of chemical reactions of elements and compounds with reactive gases like oxygen or fluorine are determined. [Pg.317]

The major differences between the fluorine and oxygen combustion calorimetry methods arise from the exceptional reactivity and toxicity of fluorine. The substances studied by oxygen combustion calorimetry are normally stable when kept inside a bomb at 298.15 K and under 3 MPa of O2. Oxygen- and moisture-sensitive compounds can also be studied because various types of containers are available to prevent their reaction with O2 prior to ignition. Common examples are glass ampules, which are inert toward the combustion process and, more commonly, Melinex bags or polyethene ampules, which burn cleanly to CO2 and H2O. As carbon dioxide and water are also generated in the combustion of the sample, no extra complexity is introduced in the analysis of the final state of the bomb process by the use of those plastic containers. [Pg.121]

Difluorine combines directly with all elements except O2, N2 and the lighter noble gases reactions tend to be very violent. Combustion in compressed F2 (fluorine bomb calorimetry) is a suitable method for determining values of Af77° for many binary metal fluorides. However, many metals are passivated by the formation of a layer of nonvolatile metal fluoride. Silica is thermodynamically unstable with respect to reaction 16.5, but, unless the Si02 is powdered, the reaction is slow provided that HF is absent the latter sets up the chain reaction 16.6. [Pg.474]

The second volume in this series, edited by Skinner, treats many kinds of combustion calorimetry, fluorine reaction calorimetry, reaction calorimetry, high-temperature calorimetry, solution calorimetry, heats of mixing, microcalorimetry, and biochemical reactions. [Pg.55]


See other pages where Fluorine combustion calorimetry reaction is mentioned: [Pg.131]    [Pg.191]    [Pg.208]    [Pg.209]    [Pg.349]    [Pg.114]    [Pg.318]    [Pg.120]    [Pg.387]    [Pg.633]    [Pg.20]    [Pg.600]    [Pg.109]    [Pg.116]    [Pg.117]    [Pg.350]    [Pg.432]    [Pg.67]    [Pg.123]    [Pg.26]    [Pg.110]    [Pg.115]   
See also in sourсe #XX -- [ Pg.121 ]




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