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  • transient hot-wire method  (4)
  • 2-methyl-2-propanol  (3)
  • methanol  (3)
  • decanol  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Thermal conductivity of fourteen liquids in the temperature range 298–373 K (1982)
    Springer
    International journal of thermophysics 3 (1982), S. 101-116 
    Details
    ISSN: 1572-9567
    Schlagwort(e): aromatic hydrocarbons ; cyclohexane ; n-alkanes ; phenyl halides ; thermal conductivity ; toluene ; transient hot-wire method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract New experimental data on the thermal conductivity of 14 organic liquids at atmospheric pressure are presented in the temperature range from 25 to 100°C. The liquids measured are five n-alkanes (C6, C7, C8, C10, C12), cyclohexane, six aromatic hydrocarbons (benzene, ethylbenzene, o-, m-, p-xylenes, isopropylbenzene) and two phenyl halides (chloro-, bromobenzenes). The measurements were performed by a transient hot-wire method on a relative basis. The thermal conductivity of toluene, which was selected as a reference liquid, was determined on an absolute basis with another transient apparatus. The precision of the present experimental results is within ±1.2%. The uncertainty of the thermal conductivity values is estimated to be within ±2%; this includes the uncertainty of the values of toluene as the reference liquid. The experimental results for each liquid are represented satisfactorily by a linear equation in temperature. At a reduced temperature T/T c=0.5, thermal conductivity has a simple relation with the molar density for each homologous series of liquids.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00503634
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  • 2
    Digitale Medien
    Digitale Medien
    Solid-liquid phase equilibria of benzene + 2-methyl-2-propanol system under high pressures (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 61-71 
    Details
    ISSN: 1572-9567
    Schlagwort(e): benzene ; high pressure ; 2-methyl-2-propanol ; solid-liquid phase equilibrium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Solid-liquid phase equilibria of the benzene + 2-methyl-2-propanol system have been investigated at temperatures from 278 to 323 K and pressures up to 300 MPa using a high-pressure optical vessel. The uncertainties of the measurements of temperature, pressure and composition are within ±0.1 K, ±0.5 MPa, and ±0.001 mole fraction, respectively. The freezing pressure at a constant composition increases monotonously with pressure. The eutectic point shifts to a higher temperature and benzene-rich composition with increasing pressure. In order to describe the pressure-temperature-composition relation of high-pressure solid-liquid phase equilibria, a new simple equation has been proposed as follows: $$In x_i (P,T) = - \frac{1}{{RT}}\{ C(T)[P - B(T)] + D(T)[P^2 - B(T)^2 ]\} $$ where B, C, and D are the temperature-dependent coefficients and are expressed by the polynomials of reciprocal of temperature. It is found that the solid-liquid coexistence curves of both eutectic systems and solid-solution systems can be correlated satisfactorily by this equation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00504000
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  • 3
    Digitale Medien
    Digitale Medien
    Thermal conductivity of liquid halogenated ethanes under high pressures (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 465-479 
    Details
    ISSN: 1572-9567
    Schlagwort(e): fluorocarbon ; halogenated ethane ; liquid ; high pressure ; refrigerant ; thermal conductivity ; transient hot-wire method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract New experimental data on the thermal conductivity of liquid halogenated ethanes, R112 (CCl2F-CCl2F), R113 (CCl2F-CClF2), R114 (CClF2-CClF2), R114B2 (CBrF2-CBrF2), and R123 (CHCl2-CF3), are presented in the temperature range from 283 to 348 K at pressures up to 200 MPa or the freezing pressures. The measurements were carried out by a transient hot-wire apparatus within an uncertainty of ±1.0%. The thermal conductivity data obtained have been analyzed by means of the corresponding-states principle and other empirical methods. It is found that the corresponding-states correlation λ=f(Tr, Pr) holds well for R112, R113, and R114. The thermal conductivity can also be correlated satisfactorily with temperature, pressure, and molar volume by a similar expression to the Tait equation and the dense hard-sphere model presented by Dymond.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00503147
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  • 4
    Digitale Medien
    Digitale Medien
    Viscosity of methanol and 2-methyl-2-propanol mixtures under high pressures (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 459-468 
    Details
    ISSN: 1572-9567
    Schlagwort(e): alcohols ; capillary viscometer ; methanol ; 2-methyl-2-propanol ; viscosity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new capillary viscometer has been constructed and the viscosities of methanol, 2-methyl-2-propanol, and their mixtures have been measured at two temperatures, 303 and 323 K, and at pressures up to 30 MPa. Simple empirical equations are given to represent the pressure and composition dependences of the viscosity within the experimental uncertainty of ±2%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00502362
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  • 5
    Digitale Medien
    Digitale Medien
    Thermal conductivity and density of toluene in the temperature range 273–373 K at pressures up to 250 MPa (1982)
    Springer
    International journal of thermophysics 3 (1982), S. 201-215 
    Details
    ISSN: 1572-9567
    Schlagwort(e): density ; isothermal compressibility ; Tait equation ; thermal conductivity ; thermal expansion coefficient ; toluene ; transient hot-wire method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract New experimental data on the thermal conductivity and the density of liquid toluene are presented in the temperature range 0–100°C at pressures up to 250 MPa. The measurements of thermal conductivity were performed with a transient hot-wire apparatus on an absolute basis with an inaccuracy less than 1.0%. The density was measured with a high-pressure burette method with an uncertainty within 0.1%. The experimental results for both properties are represented satisfactorily by the Tait-type equations, as well as empirical polynomials, covering the entire ranges of temperature and pressure. Furthermore, it is found that simple relations exist between the temperature dependence of thermal conductivity and the thermal expansion coefficient, and also between the pressure dependence of thermal conductivity and the isothermal compressibility, as are suggested theoretically.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00503316
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  • 6
    Digitale Medien
    Digitale Medien
    Viscosity of (water + alcohol) mixtures under high pressure (1987)
    Springer
    International journal of thermophysics 8 (1987), S. 147-163 
    Details
    ISSN: 1572-9567
    Schlagwort(e): alcohols ; aqueous alcohol solutions ; ethanol ; free-volume theory ; methanol ; 2-methyl-2-propanol ; pressure effect ; propanol ; Tait equation ; t-butyl alcohol ; viscosity ; water
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract New experimental viscosity data are presented for aqueous solutions of methanol, ethanol, 1-propanol, 2-propanol, and 2-methyl-2-propanol (t-butyl alcohol) in the temperature range from 283 to 348 K and pressures up to 120 MPa. The viscosity measurements were performed using a falling-cylinder viscometer on a relative basis with an uncertainty of less than 2%. The viscosity of pure alcohols and aqueous solutions is found to increase almost linearly with increasing pressure, whereas that of water decreases slightly with pressure at temperatures below 298 K. As for the composition dependence of the viscosity, a distinct maximum appears near 0.3–0.4 mole fraction of alcohol on all isobars at each temperature. The viscosity maximum shifts gradually to a higher alcohol concentration with increasing temperature and pressure. The isobars of aqueous 2-propanol and 2-methyl-2-propanol solutions have another shallow minimum near 0.9 mole fraction of alcohol below 323 K. The experimental results were analized empirically by a Tait-type equation and a free-volume theory. It was found that the isothermal viscosity data were satisfactorily correlated by these equations as functions of pressure and composition or of density and composition.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00515199
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  • 7
    Digitale Medien
    Digitale Medien
    Thermal conductivity of five normal alkanes in the temperature range 283–373 k at pressures up to 250 MPa (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 331-350 
    Details
    ISSN: 1572-9567
    Schlagwort(e): alkane ; correlation ; decane ; dodecane ; heptane ; hexane ; octane ; thermal conductivity ; transient hot-wire method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Experimental data on the thermal conductivity of five liquid n-alkanes-hexane, heptane, octane, decane, and dodecane-are presented in the temperature range from 283 to 373 K at pressures up to 250 MPa or the freezing pressures. The measurements were performed on an absolute basis by an automated transient hot-wire apparatus. The uncertainty of the reported data is estimated to be within ±1%. The thermal conductivity of each alkane decreases almost linearly with rising temperature at a constant pressure and increases with increasing pressure at a constant temperature. Both the temperature coefficient of the thermal conductivity ¦(∂λ/∂T) p¦ and the pressure coefficient (∂λ/∂P) T decrease with increasing carbon number of alkanes. The experimental results were correlated with temperature and pressure by a similar expression to the Tait equation. It is also found that both the dense hard-sphere model presented by Menashe et al. and the modified significant structure theory proposed by Prabhuram and Saksena provide good representations of the present experimental results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00513075
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  • 8
    Digitale Medien
    Digitale Medien
    Viscosities of six 1-Alkanols at temperatures in the range 298–348 K and pressures up to 200 MPa (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 833-843 
    Details
    ISSN: 1572-9567
    Schlagwort(e): decanol ; dodecanol ; falling-body viscometer ; free volume ; hexadecanol ; hexanol ; high pressure ; octanol ; significant structure theory ; tetradecanol ; viscosity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Viscosities of six higher 1-alkanols (1-hexanol, 1-octanol, 1-decanol, 1-dodecanol, 1-tetradecanol, and 1-hexadecanol) have been determined at temperatures from 298 to 348 K and pressures up to 200 MPa. The viscosity measurements were performed using a falling-body viscometer with an uncertainty of ±5%. Simple equations are presented to express the experimental viscosities as a function of temperature and pressure within the experimental uncertainty. The relationship between the viscosity and the density of these alkanols is discussed in terms of the significant structure theory extended to high pressures.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00514479
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  • 9
    Digitale Medien
    Digitale Medien
    Volumetric properties of 1-alkanols at temperatures in the range 298–348 K and pressures up to 40 MPa (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 885-897 
    Details
    ISSN: 1572-9567
    Schlagwort(e): decanol ; density ; dodecanol ; hexadecanol ; hexanol ; high pressure ; isothermal compressibility ; octanol ; Tait equation ; tetradecanol ; thermal expansion coefficient
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Molar volumes, thermal expansion coefficients, and isothermal compressibilities of six higher 1-alkanols (1-hexanol, 1-octanol, 1-decanol, 1-dodecanol, 1-tetradecanol, and 1-hexadecanol) have been determined at temperatures from 298 to 348 K and pressures up to 40 MPa. The density measurements were performed using a vibrating densitometer with an uncertainty of ±0.06%. The relationship between the properties and the structures of these alkanols is discussed in terms of the carbon-chain lengths.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00514483
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  • 10
    Digitale Medien
    Digitale Medien
    Volumetric behavior of pure alcohols and their water mixtures under high pressure (1987)
    Springer
    International journal of thermophysics 8 (1987), S. 47-70 
    Details
    ISSN: 1572-9567
    Schlagwort(e): alcohols ; aqueous mixtures ; butanols ; compressibility ; ethanol ; excess volume ; high pressure ; methanol ; propanols ; specific volume ; Tait equation ; water
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The specific volumes of C1-C4 alcohols and binary mixtures of water with methanol, ethanol, 1-propanol, 2-propanol, and 2-methyl-2-propanol are presented as functions of temperature, pressure, and composition. The measurements were carried out using a modified Adams piezometer and a high-pressure burette method in a temperature range from 283.15 to 348.15 K at pressures up to 350 MPa. The uncertainties in the specific volume obtained are estimated to be less than 0.09%. The specific volumes of the pure alcohols and their mixtures with water are found to decrease monotonously with increasing pressure. The numerical P-V relations at each temperature and composition are correlated satisfactorily as a function of pressure by the Tait equation. Definite inflections appear on the isobars of isothermal compressibility or partial molar volume versus composition of alcohol + water mixtures.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00503224
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