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THERMAL EXPANSION OF LIQUID NORMAL HYDROGEN BETWEEN 18.8 AND 22.2 K.

Author(s) : SCHWALBE L. A., GRILLY E. R.

Type of article: Article

Summary

THE THERMAL EXPANSION COEFFICIENT (TEC) OF LIQUID NORMAL HYDROGEN WAS MEASURED BETWEEN 18.8 AND 22.2 K IN THE PRESSURE RANGE 0.5 TO 7.0 MPASCALS. THE RESULTS ARE COMPARED WITH THOSE DERIVED FROM PVT MEASUREMENTS BY OTHERS ON BOTH NORMAL AND PARAHYDROGEN. THE ANALYSIS OF THE EARLIER NORMAL DATA INCLUDES FITTING AN EMPIRICAL EQUATION OF STATE, AND EXPANSION COEFFICIENTS ARE DERIVED FROM THIS EQUATION BY DIFFERENTIATION. THE AUTHORS DISCUSS THE EFFECTS ON TEC AND THE COMPRESSIBILITY FROM MOLECULAR QUADRUPOLE INTERACTIONS ; BOTH THEORETICAL AND EMPIRICAL RESULTS SUGGEST THESE TO BE ON THE ORDER OF 2% OR LESS FOR THE NORMAL SPIN MIXTURE.

Details

  • Original title: THERMAL EXPANSION OF LIQUID NORMAL HYDROGEN BETWEEN 18.8 AND 22.2 K.
  • Record ID : 1985-1355
  • Languages: English
  • Source: J. Res. NBS - vol. 89 - n. 4
  • Publication date: 1984
  • Document available for consultation in the library of the IIR headquarters only.

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