Abstract
The molar volume of liquid3He,V(P, T), was determined from measurements of the dielectric constant over the temperature range 35–1200 mK and from the vapor pressure to 24 atm. Analytical expressions were fitted to the molar volumes in order to calculate the isobaric expansion coefficient αP, the isothermal compressibility κK T, and the first-sound velocityc 1; the expansion coefficient was integrated numerically to arrive at the entropy change on compression. Values ofV(P, T) and the derived quantities are presented in tabular form at even temperatures and pressures. From this work it was found thatV(0, 0)=36.873±0.015 cm3/mole and thatc 1(0, 0)=178.4 m/sec, about 2.5% lower than the presently accepted value of 183.4 m/sec.
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Work performed under the auspices of the U.S. Atomic Energy Commission.
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Abraham, B.M., Osborne, D.W. Experimental determination of the molar volume and derivation of the expansion coefficient, entropy change on compression, compressibility, and first-sound velocity for liquid3He from 35 to 1200 mK and from the saturation pressure to 24 atm. J Low Temp Phys 5, 335–352 (1971). https://doi.org/10.1007/BF00629709
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DOI: https://doi.org/10.1007/BF00629709