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Vapor Precooling in a Pulse Tube Liquefier

September 30, 2001

Author(s)

E D. Marquardt, Ray Radebaugh, Adele P. Peskin

Accurate Measurements of Thermodynamic and Transport Properties of Industrial Gases with Acoustic Resonators.

September 2, 2001

Author(s)

Keith A. Gillis, John J. Hurly, Michael R. Moldover

Acoustic resonators have been developed at NIST as tools to measure the thermodynamic and transport properties of gases. High Q cylindrical acoustic resonators are routinely used to measure the speed of sound in gases with uncertainties of 0.01% or less

Solubilities of Cerium(IV), Terbium(III), and Iron(III) b-Diketonates in Supercritical Carbon Dioxide

September 1, 2001

Author(s)

W C. Andersen, R E. Sievers, A F. Lagalante, Thomas J. Bruno

Solubility of Capsaicin and B-Carotene in Supercritical Carbon Dioxide and in Halocarbons

September 1, 2001

Author(s)

B N. Hansen, Allan H. Harvey, J P. Coelho, M F. Palavra, Thomas J. Bruno

We measured the solubilities of Β-carotene and capsaicin in supercritical carbon dioxide, and also in difluoromethane (R-32) and 1,1,1,2-tetrafluoroethane (R-134a) in the liquid phase at temperatures near and somewhat below their critical points. Β

The NIST Chemistry WebBook: A Chemical Data Resource on the Internet

September 1, 2001

Author(s)

Peter J. Linstrom, William G. Mallard

The NIST Chemistry WebBook (http://webbook.nist.gov) is an Internet site that provides access to chemical and physical property data both from NIST and other sources. The site was established in 1996 and has grown to encompass a wide variety of

An Asymptotic Expression for the Critical-Region Bird's Beak Isotherm and Adjacent Isotherms on the Vapor-Liquid Phase Diagram of a Simple Binary Mixture

July 1, 2001

Author(s)

James C. Rainwater

For a binary mixture of a dilute nonvolatile solute in a volatile solvent, an asymptotic expression is derived for isothermal dew-bubble curves in the region just above the solvent critical point. The expression depends only on the solvent coexistence

Fitting vapor pressure temperature data: simplicity and unintended consequences

July 1, 2001

Author(s)

Michael D. Frenkel, K. R. Hall, S M. Mannan, G A. Iglesias-Silva

Computational Study of the Reactions of Methane with XO Radicals (X = F, Cl, or Br): Implications in Combustion Chemistry

May 1, 2001

Author(s)

F Louis, Thomas C. Allison, Carlos A. Gonzalez, J P. Sawerysyn

Theoretical calculations were carried out on the H-atom abstraction reaction from methane by XO (X = F, Cl or Br) radicals attack. Geometry optimizations and vibrational frequency calculations were performed using three methods: Moller-Plesset second-order

Ab Initio Study of the Intermolecular Interactions in Small Benzene Clusters: The Equilibrium Structures of Trimer, Tetramer, and Pentamer

March 15, 2001

Author(s)

Carlos A. Gonzalez, E C. Lim

Isochoric Heat Capacity Measurements for Light and Heavy Water Near the Critical Point

January 1, 2001

Author(s)

N. G. Polikhronidi, Ilmutdin M. Abdulagatov, Joe W. Magee, G. V. Stepanov

Molar Heat Capacity Cv, Vapor Pressure, and (p, rho,T) Measurements From 92 to 350 K at Pressures to 35 Mpa and a New Equation of State for Chlorotrifluoromethane (R13)

January 1, 2001

Author(s)

Joe W. Magee, Stephanie L. Outcalt, James F. Ely

Measurements of the molar heat capacity at constant volume C v for chlorotrifluoromethane (R13) were conducted using an adiabatic method. Temperatures ranged from 95 to 338 K, and pressures were as high as 35 Mpa. Measurements of vapor pressure were made

TRC SOURCE Database: A Unique Tool for Automatic Production of Data Compilations

January 1, 2001

Author(s)

Michael D. Frenkel, Qian Dong, R C. Wilhoit, K. R. Hall

Window-Based Applications of TRC Databases: Structure and Internet Distribution

January 1, 2001

Author(s)

X. Yan, Qian Dong, Michael D. Frenkel, K. R. Hall

Thermophysical and thermochemical property data on organic compounds provide vital background information for scientific and engineering communities in both academic and industrial environments. The Thermodynamics Research Center (TRC) has collected an