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%.
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Kortbeek, P.J., Trappeniers, N.J. & Biswas, S.N. Compressibility and sound velocity measurements on N2 up to 1 GPa. Int J Thermophys 9, 103–116 (1988). https://doi.org/10.1007/BF00504003
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DOI: https://doi.org/10.1007/BF00504003