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  • heat capacity  (5)
  • Springer  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 15 (1994), S. 1333-1343 
    ISSN: 1572-9567
    Keywords: absolute thermopower ; evaluated data ; electrical resistivity ; heat capacity ; thermal conductivity ; thermal expansion ; Al2O3 ; Cu ; Fe ; Pt ; Si ; Pb ; W
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In 1995 the Committee on Data for Science and Technology (CODATA) published a Report of its Task Group on Thermophysical Properties of Solids which analyzed available data on, and gave recommended values for, the heat capacity of Al2O3, Cu, W, and Fe, the thermal expansion of Cu. Si, W, and Al2O3, the electrical resistivity of Cu, Fe, W. and Pt, the thermal conductivity of AI, Cu, Fe, and W, and the absolute thermopower of Pb, Cu, and Pt, The Chairman of the Task Group was Professor Y. S. Touloukian. until his death in 1981, and later was Dr, Merrill Minges, Since that publication there have been more measurements of heat capacity (Cu), thermal expansion (Si and W), and thermopower (W). particularly at high temperatures with subsecond techniques, which have led us to reanalyze some of the data and change some “recommended” values, Revised tables and some algebraic expressions are presented here.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 17 (1996), S. 1025-1036 
    ISSN: 1572-9567
    Keywords: electrical resistivity ; Frenkel disorder ; heat capacity ; melting point ; thoria ; tungsten ; welding electrodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Thoriated tungsten (tungsten, 98% thorium oxide, 2%) is a widely used electrode material for inert-gas arc-welding. A subsecond pulse-heating technique was applied to rod specimens: radiance temperature was measured by high-speed pyrometry. Literature values of the temperature dependence of the normal spectral emissivity of tungsten were used to obtain true temperatures, with the melting point of thoriated tungsten as a calibration point. Experimental results obtained in the temperature range from 3600 K to the melting point (3693 K) are presented and discussed, along with data obtained during the initial part of the free cooling period. The electrical resistivity results show a regular behavior up to the melting point, indicating that thoria remains an insulator up to 3680 K. During heating, a heat capacity anomaly is found near 3666 K, interpreted as the melting point of thoria. During cooling, two anomalies are found, the first one with a peak near 3660 K and a second one (possibly a Frenkel disorder) with a peak near 3148 K.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 8 (1990), S. 215-225 
    ISSN: 1573-1111
    Keywords: Diamn's compound ; heat capacity ; thermal properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The heat capacities of unsolvated (‘empty’) Dianin's compound (4p-hydroxypheny]-2,2, 4-trimethylchroman) and the ethanol and carbon tetrachloride adducts of Dianin's compound have been measured in the 30–300K temperature range. The molar heat capacities of the guest species were calculated from the experimental results and compared with molar heat capacities of bulk CCl4 and bulk C2H5OH The stoichiometry of the CCl4 adduct was determined to be six host molecules per guest CCl4, in contrast to an earlier report.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 17 (1988), S. 733-750 
    ISSN: 1572-8927
    Keywords: Flow calorimeter ; heat capacity ; heat loss ; thermal model ; aqueous sodium chloride ; aqueous potassium chloride ; aqueous 2-methylpropan-2-ol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A single equation describes all linear thermal models for the heat losses in heat capacity flow calorimeters. This equation is used to correct for heat losses by extrapolating the apparent heat capacity to the zero value of a modified reciprocal flow rate. The method, which does not require an auxiliary pump, has been successfully tested for aqueous sodium chloride solutions to 300.8°C, with the derived apparent molar heat capacities being in agreement with literature values. Aqueous solutions of 2-methylpropan-2-ol (t-butanol) gave anomalous results requiring further investigation. Two other correction methods are both consistent with the new method but apply less generally and require care in the evaluation of the correction factors.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 9 (1988), S. 839-848 
    ISSN: 1572-9567
    Keywords: Grüneisen parameter ; heat capacity ; high temperatures ; transition elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In recent years better data have appeared for thermophysical properties of some transition elements at high temperatures (e.g., Ta, Nb, Mo, W, Pt) using subsecond techniques and refinements in thermometry. These data enable us to deduce values for the heat capacity at a constant volume C v and compare them with the expected lattice vibrational contribution. We attribute the differences chiefly to electronic effects and compare these with results of low-temperature measurements. While calculating the C p-to-C v correction, we obtain values for the Grüneisen parameter γ which are useful in assessing the “reliability” of the measured data.
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