THE THERMODYNAMIC AND PHYSICAL PROPERTIES OF BERYLLIUM COMPOUNDS. I. ENTHALPY AND ENTROPY OF VAPORIZATION OF BERYLLIUM FLUORIDE

Journal Article · Mon Jan 21 23:00:00 EST 1963 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100795a009· OSTI ID:4719085

Greenbaum, Michael A.; Foster, James N.; Arin, M. Louis; Farber, Milton

Using torsion effusion, gravimetric effusion, and transpiration techniques, the enthalpy and entropy of vaporization of BeF₂ were determined over the temperature range 550 to 950 deg . The enthalpy of vaporization in this temperature range was found to be 53.25 plus or minus 0.25 kcal, while the corresponding entropy was found to be 38.7 plus or minus 0.6 cal/deg/mole. A determination of the melting point of crystalline BeF₂ by means of vapor pressure measurements yielded a value of 542 plus or minus 3 deg . Torsion effusion measurements of the effusing vapor show the gaseous species over liquid beryllium fluoride to consist of BeF/sub 2/. (auth)

• Research Organization: Rocket Power, Inc., Pasadena, Calif.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-010627
• OSTI ID: 4719085
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 1 Vol. 67; ISSN 0022-3654
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BERYLLIUM FLUORIDES
CHEMISTRY
CRYSTALS
DIFFUSION
EVAPORATION
FUSED SALTS
HIGH TEMPERATURE
MELTING
MELTING POINTS
PRESSURE
QUANTITATIVE ANALYSIS
THERMODYNAMICS
VAPORS