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Author Bigeleisen, J. ♦ Roth, E.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ DEBYE TEMPERATURE ♦ LATTICES ♦ LIQUIDS ♦ LOW TEMPERATURE ♦ MEASURED VALUES ♦ NEON ISOTOPES ♦ OSCILLATIONS ♦ PRESSURE ♦ SOLIDS ♦ SPECIFIC HEAT ♦ TEMPERATURE ♦ THERMODYNAMICS ♦ VAPORS
Abstract The ratio of the vapor pressures of Ne/sup 20/ and Ne/sup 22/ were measured in the temperature range 16--30 deg K. An accuracy of about 1% in the logarithm of the vapor-pressure ratio was achieved. The latter is checked by comparisons of triple-point pressures, equilibrium fractionation experiments, and the entropy difference of the condensed phases with thermal measurements. The Debye temperature for the solid derived from the ratio of the vapor pressures was 74.6 deg K. The discrepancy between the characteristic temperatures derived from measurements of free energy with those from heat capacities is attributed to the role of the anharmonicity of the lattice. lt is shown that the difference in the thermodynamic properties of solid and liquid neon in the vicinity of the triple point can be attributed to the change in coordination number. (auth)
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-07-01
Publisher Department Brookhaven National Lab., Upton, N.Y.
Publisher Place United States
Journal Journal of Chemical Physics
Volume Number 35
Technical Publication No. BNL-5100
Organization Brookhaven National Lab., Upton, N.Y.


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