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  • 1
    Electronic Resource
    Electronic Resource
    Measurement of the compressibility and sound velocity of helium up to 1 GPa (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 425-438 
    Details
    ISSN: 1572-9567
    Keywords: adiabatic compressibility ; equation of state ; density ; high pressure ; isothermal compressibility ; helium ; pVT ; sound velocity ; ultrasonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By using a gas expansion technique, the density of helium has been determined at 298.15 K as a function of pressure from 100 MPa to 1 GPa. The precision of the measurements is 0.02%, while the estimated absolute accuracy is about 0.08%. The sound velocity has been measured by a phase-comparison pulseecho technique between 98 and 298 K with intervals of 25 K and at pressures up to 1 GPa, with an accuracy generally better than 0.04%. By combining pVT with velocity-of-sound data at 298 K, the adiabatic compressibility and the ratio of the specific heats are calculated. The experimental sound velocities are compared with the values, predicted from an equation of state as proposed by Hansen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00513081
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  • 2
    Electronic Resource
    Electronic Resource
    Compressibility and sound velocity measurements on N2 up to 1 GPa (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 103-116 
    Details
    ISSN: 1572-9567
    Keywords: adiabatic compressibility ; equation of state ; density ; high pressure ; isothermal compressibility ; nitrogen ; pVT ; sound velocity ; ultrasonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A gas expansion technique has been used to determine the pVT properties of N2 up to 1 GPa at 298.15 K, with an accuracy of 0.08% in density, 1 mK in temperature, and 0.05%+0.2 MPa in pressure. The sound velocity has been measured by a phase-comparison pulse-echo technique between 123 and 298 K at intervals of 25 K and at pressures up to 1 GPa, with an accuracy of better than 0.02% in sound velocity, 10 mK in temperature, and 0.05%+0.2 MPa in pressure. An equation of state is presented that correlates the density data over the wide pressure range of 36–1000 MPa with maximum deviations between the calculated and the experimental densities of less than 0.05%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00504003
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the compressibility and sound velocity of neon up to 1 GPa (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 803-812 
    Details
    ISSN: 1572-9567
    Keywords: compressibility ; equation of state ; high pressure ; neon ; pVT ; sound velocity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The density of neon has been determined at 298.15 K as a function of pressure from 80 MPa to 1 GPa. The precision of the measurements is 0.03%, while the estimated absolute accuracy is between 0.05 and 0.09%. The sound velocity has been measured between 98 and 298 K with intervals of 25 K and at pressures up to 1 GPa, with an accuracy generally better than 0.06%. The adiabatic compressibility and the ratio of the specific heats are calculated by combining pVT with velocity-of-sound data at 298 K. Several equations of state are fitted to the density data at 298.15 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503246
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