Aqueous systems at high temperature. XX. Dissociation constant and thermodynamic functions for magnesium sulfate to 200.degree.

1967 ◽  
Vol 71 (11) ◽  
pp. 3584-3588 ◽  
Author(s):  
William L. Marshall
Keyword(s):  
High Temperature ◽  
Magnesium Sulfate ◽  
Dissociation Constant ◽  
Thermodynamic Functions ◽  
Aqueous Systems

Hydrolysis of Zinc Ion and Solubility of Zinc Oxide in High-Temperature Aqueous Systems

1997 ◽  
Vol 127 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Yukiko Hanzawa ◽  
Daisuke Hiroishi ◽  
Chihiro Matsuura ◽  
Kenkichi Ishigure ◽  
Masashi Nagao ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Temperature ◽  
Zinc Ion ◽  
Aqueous Systems ◽  
Hydrolysis Of

Computation of Thermodynamic Properties of Carbon Dioxide in the Range 0–750 Deg C

1970 ◽  
Vol 92 (3) ◽  
pp. 301-309 ◽  
Author(s):  
G. Angelino ◽  
E. Macchi
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
High Temperature ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Critical Region ◽  
Density Measurement ◽  
Working Fluid ◽  
Power Cycles ◽  
Wide Range

The computation of power cycles employing carbon dioxide as working fluid and extending down to the critical region requires the knowledge of the thermodynamic properties of CO2 within a wide range of pressures and temperatures. Available data are recognized to be insufficient or insufficiently accurate chiefly in the vicinity of the critical dome. Newly published density and specific heat measurements are employed to compute thermodynamic functions at temperatures between 0 and 50 deg C, where the need of better data is more urgent. Methods for the computation of thermal properties from density measurement in the low and in the high temperature range are presented and discussed. Results are reported of the computation of entropy and enthalpy of CO2 in the range 150–750 deg C and 40–600 atm. The probable precision of the tables is inferred from an error analysis based on the generation, by means of a computer program of a set of pseudoexperimental points which, treated as actual measurements, yield useful information about the accuracy of the calculation procedure.

High temperature enthalpy increment and thermodynamic functions of U2Ti

2012 ◽  
Vol 112 (1) ◽  
pp. 141-145 ◽  
Author(s):  
D. Chattaraj ◽  
Ram Avtar Jat ◽  
S. C. Parida ◽  
Renu Agarwal ◽  
Smruti Dash
Keyword(s):  
High Temperature ◽  
Thermodynamic Functions ◽  
Enthalpy Increment

Theory of interparticle correlations in dense, high-temperature plasmas. III. Thermodynamic functions

1985 ◽  
Vol 32 (3) ◽  
pp. 1779-1784 ◽  
Author(s):  
Shigenori Tanaka ◽  
Shinichi Mitake ◽  
Xin-Zhong Yan ◽  
Setsuo Ichimaru
Keyword(s):  
High Temperature ◽  
Thermodynamic Functions

scholarly journals The Phase Transition and Dehydration in Epsomite under High Temperature and High Pressure

Crystals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 75 ◽  
Author(s):  
Linfei Yang ◽  
Lidong Dai ◽  
Heping Li ◽  
Haiying Hu ◽  
Meiling Hong ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
High Pressure ◽  
High Temperature ◽  
Magnesium Sulfate ◽  
Room Temperature ◽  
Diamond Anvil Cell ◽  
Vibrational Modes ◽  
Diamond Anvil ◽  
T Phase

The phase stability of epsomite under a high temperature and high pressure were explored through Raman spectroscopy and electrical conductivity measurements in a diamond anvil cell up to ~623 K and ~12.8 GPa. Our results verified that the epsomite underwent a pressure-induced phase transition at ~5.1 GPa and room temperature, which was well characterized by the change in the pressure dependence of Raman vibrational modes and electrical conductivity. The dehydration process of the epsomite under high pressure was monitored by the variation in the sulfate tetrahedra and hydroxyl modes. At a representative pressure point of ~1.3 GPa, it was found the epsomite (MgSO4·7H2O) started to dehydrate at ~343 K, by forming hexahydrite (MgSO4·6H2O), and then further transformed into magnesium sulfate trihydrate (MgSO4·3H2O) and anhydrous magnesium sulfate (MgSO4) at higher temperatures of 373 and 473 K, respectively. Furthermore, the established P-T phase diagram revealed a positive relationship between the dehydration temperature and the pressure for epsomite.

Apparatus for Controlled Hydrodynamic Electrochemical and Corrosion Studies in High-Temperature Aqueous Systems

CORROSION ◽  
1988 ◽  
Vol 44 (3) ◽  
pp. 186-192 ◽  
Author(s):  
D. D. Macdonald ◽  
J. Mankowski ◽  
M. Karaminezhaad-Ranjbar ◽  
Y.-H. Hu
Keyword(s):  
High Temperature ◽  
Aqueous Systems ◽  
Corrosion Studies
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