Publications

Displaying 1 - 25 of 27

Enthalpies of Solution of Sodium Chloride and Potassium Sulfate in Water. Thermodynamic Properties of the Potassium Sulfate and Water System

October 16, 2008

Author(s)

Donald G. Archer, D R. Kirklin

An adiabatic calorimeter was used to measure enthalpies of solution into water of sodium chloride (0.13 mol.kg-1) at nominal temperatures of 298.15 K, 303.15 K, and 308.15 K and of potassium sulfate (0.039 mol.kg-1) at nominal temperatures of 298.15 K and

New NIST Traceable Standards for Calibration and Validation of Differential Scanning Calorimetry

October 16, 2008

Author(s)

Donald G. Archer

Several reference materials and associated reference value have been recommended for the purposes of calibration and/or validation of differential scanning calorimetry (DSC). However, issues of available sample purity, reference property value accuracy

Thermodynamic Properties of Some Arsenic Compounds of Import to Groundwater Applications

October 16, 2008

Author(s)

Donald G. Archer, D K. Nordstrom, J G. Webster

Thermodynamic properties of several arsenic-containing substances are reviewed here, and a consistent set of thermodynamic properties for these species, derived from the measured values, is presented. The species considered were 1) those expected to occur

New NIST-traceable Standards for Calibration and Validation of Differential Scanning Calorimetry

July 3, 2006

Author(s)

Donald G. Archer

Several reference materials and associated reference values have been recommended for the purposes of calibration and/or validation of differential scanning calorimetry (DSC). However, issues of available sample purity, reference-property value accuracy

Enthalpy of Solution of 1-Octyl-3-methylimidazolium Tetrafluoroborate in Water and in Aqueous Sodium Fluoride

June 21, 2005

Author(s)

Donald G. Archer, Jason A. Widegren, Duane R. Kirklin, Joe W. Magee

An adiabatic calorimeter was used to measure the enthalpy of solution of 1-octyl-3-methylimidazolium tetrafluoroborate (0.0035 mol•kg-1 to 0.02 mol•kg-1) into water and into aqueous sodium fluoride of different ionic strengths (0.1 mol•kg-1 to 0.43 mol•kg

Enthalpy of Solution of 1-Octyl-3-Methylimidazolium Tetrafluoroborate in Water and in Aqueous

June 1, 2005

Author(s)

Donald G. Archer

An adiabatic calorimeter was used to measure the enthalpy of solution of potassium tetrafluoroborate (0.01mol kg^-1 to 0.02 mol kg^-1) into water and into aqueous sodium fluoride of different ionic strengths (0.2 mol kf^-1 and 0.5 mol kg^-1) at 298 K and

Enthalpy of solution of potassium tetrafluoroborate in water and in aqueous sodium fluoride. Thermodynamic properties of the aqueous tetrafluouroborate anion and potassium tetrafluroborate

February 4, 2005

Author(s)

Donald G. Archer

An adiabatic calorimeter was used to measure the enthalpy of solution of potassium tetrafluoroborate (0.01mol.kg-1 to 0.02 mol.kg-1) into water and into aqueous sodium fluoride of different ionic strengths (0.2 mol.kg-1 and 0.5 mol.kg-1) at 298 K and 313 K

Enthalpy of Solution of Potassium Tetrafluoroborate in Water and in Aqueous Sodium Fluoride. Thermodynamic Properties of the Aqueous Tetrafluoroborate Anion and Potassium Tetrafluoroborate.

February 1, 2005

Author(s)

Donald G. Archer

An adiabatic calorimeter was used to measure the enthalpy of solution of potassium tetrafluoroborate (0.01 mol multiplied by kg^-^1 to 0.02 mol multiplied by kg^-^1) in water and in aqueous sodium fluoride of different ionic strengths (0.2 mol multiplied

Enthalpy of Fusion of Bismuth: A Certified Reference Material for Differential Scanning Calorimetry

September 1, 2004

Author(s)

Donald G. Archer

An adiabatic calorimeter was used to measure the enthalpy of fusion of a sample of high-purity bismuth. The new value of the entalpy of fusion was determined to be delta^fusH=(53.146 plus or minus 0.082) J multiplied g negative 1, where the uncertainty

Enthalpies of Dilution of NdCl 3 (aq) at Temperatures from 297.89 K to 372.08 K and an Extended Pitzer Ion-Interaction Model for the NdCl 3 + H 2 O System

March 1, 2004

Author(s)

C S. Oakes, J A. Rard, Donald G. Archer

Enthalpy of dilution measurements were made for NdCl 3(aq) over the molality range 0.0080 mol.kg -1 to 2.6883 mol.kg -1 at temperatures from 297.89 K to 372.08 K and at a fixed pressure of 0.5 MPa. Published values of the osmotic coefficients, emfs of a

Enthalpy of Fusion of Indium: A Certified Reference Material for Differential Scanning Calorimetry

October 1, 2003

Author(s)

Donald G. Archer, S Rudtsch

An adiabatic calorimeter was used to measure the enthalpy of fusion of a very pure sample of indium. The new value of the enthalpy of fusion was determined to be δ fusH = (28.6624 0.0076) J g -1, where the uncertainty corresponded to a 95% confidence

Arsenic Thermodynamic Data and Environmental Geochemistry

January 1, 2003

Author(s)

D K. Nordstrom, Donald G. Archer

Thermodynamic data are critical as input to models that attempt to interpret the geochemistry of environmentally important elements such as arsenic. Unfortunately, the thermodynamic data for mineral phases of arsenic and their solubilities have been highly

Isopiestic Determination of the Osmotic and Activity Coefficients of K 2 SO 4 (aq) at the Temperatures 298.15 and 323.15 K, and Revision of the Thermodynamic Properties of the K 2 SO 4 + H 2 O System

December 1, 2002

Author(s)

D A. Palmer, Donald G. Archer, J A. Rard

Isopiestic vapor-pressure measurements were made for K 2SO 4(aq) from 0.228 to 0.740 mol .kg -1 at 298.15 k and from 0.219 to 0.957 mol .kg -1 at 323.15 K, using NaCl(aq) as the isopiestic reference standard. These isopiestic measurements extend to

New NIST-Traceable Standards for Calibration and Validation of DSC

September 1, 2002

Author(s)

Donald G. Archer

NIST is generating a new suite of Standard Reference Materials for calibration and validation of Differential Scanning Calorimetry (DSC). Calibration and validation of DSC measurement methods require having known property values of some reference materials

The Enthalpy of Fusion of Gallium

March 1, 2002

Author(s)

Donald G. Archer

Enthalpies of Solution of Sodium Chloride and Potassium Sulfate in Water. Thermodynamic Properties of the Potassium Sulfate Plus Water System

February 1, 2002

Author(s)

Donald G. Archer, D R. Kirklin

An adiabatic calorimeter was used to measure enthalpies of solution into water of sodium chloride ({equal to or nearly equal to} 0.13 mol.kg -1) at nominal temperatures of 298.15 K, 303.15 K, and 308.15 K and of potassium sulfate ({equal to or nearly equal

Heat Capacity of NaNO 3 (aq) in Stable and Supercooled States. Ion Association in the Supercooled Solution.

November 1, 2000

Author(s)

R W. Carter, Donald G. Archer

The heat capacity of NaNO 3(aq) from 0.1 to 10 mol.kg -1 was measured from 285 to 236 K, or lower temperatures, at 0.1 Mpa, with a differential scanning calorimeter (DSC). A cooling scan method permitted supercooling of the aqueous solutions well below

Thermodynamic Properties of the NaCl + H 2 O System. 4. Heat Capacities of H 2 O and NaCl(aq) in Cold-Stable and Supercooled States

September 1, 2000

Author(s)

Donald G. Archer, R W. Carter

The heat capacities of water and NaCl(aq) from 0.05 to 6 mol.kg -1 were measured from 285 K to a lower temperature of 202 K 2O system was generated on the bases of the present measurements as well as other experimental results that spanned the range of the

Thermodynamic Properties of the NaNO 3 +H 2 O System

September 1, 2000

Author(s)

Donald G. Archer

Thermodynamic Properties of the KCl+H 2 O System

December 1, 1999

Author(s)

Donald G. Archer

Thermodynamic Properties of Import to Environmental Processes and Remediation. II. Previous Thermodynamic Property Values for Nickel and Some of its Compounds

September 1, 1999

Author(s)

Donald G. Archer

The sources of previous thermodynamic property values are detailed for nickel and some compounds of nickel that might be expected as derivative from anthropogenic introduction of nickel into the environment or are required for calculation of thermodynamic

Enthalpy Increment Measurements from 4.5 K to 350 K and the Thermodynamic Properties of the Titanium Silicide TiSi(cr)

February 1, 1999

Author(s)

Donald G. Archer, R J. Kematick, C E. Myers, A Agarwal, E J. Cotts

Enthalpy increments for TiSi(cr) were measured from 4.5 K to 350 K with an adiabatic calorimeter. A small anomaly, unknown origin, was detected between 5K and 15 K. From the present measurements and other measurements in the literature, the enthalpy

Isopiestic Investigation of the Osmotic and Activity Coefficients of Aqueous MgSO 4 and the Solubility of MgSO 4 X7H 2 O(cr) at 298.15K: Thermodynamic Properties of the MgSO 4 + H 2 O System

September 1, 1998

Author(s)

Donald G. Archer, J A. Rard

Isopiestic determinations of the osmotic coefficient of MgSO 4(aq) against NaCl(aq) and Kcl(aq) reference standards were performed with long equilibration times ranging to 98 days. A value of the 298.15 K solubility of epsomite, MgSO 47H 2O was also

Thermodynamic Properties of Import to Environmental Processes and Remediation. I. Previous Thermodynamic Property Values for Cadminum and Some of its Compounds

September 1, 1998

Author(s)

Donald G. Archer

Enthalpy Increment Measurements for NaClcr) and KBrcr) from 4.5 to 350 K. Thermodynamic Properties of the NaCl + H 2 O System. III

December 1, 1997

Author(s)

Donald G. Archer

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