TY - JOUR
T1 - Direct calorimetric measurement of enthalpies of aqueous sodium chloride solutions at high temperatures and pressures
AU - Kasper, Robert B.
AU - Holloway, John R.
AU - Navrotsky, Alexandra
N1 - Funding Information:
Science Foundation (Grants CHE 75-16316
PY - 1979/1
Y1 - 1979/1
N2 - A new calorimetric technique, which combines a hydrothermal cold-seal pressure vessel and a Calvet-type microcalorimeter, provides direct enthalpy measurements of solutions at temperatures to 1073 K and pressures to 200 MPa. We report initial results for enthalpies measured for NaCl + H2O at temperatures of 985, 536, and 457 K and pressures of 51 and 100 MPa over a molality range of 0 to 6 mol kg-1. The partial molar enthalpies of NaCl, calculated from the results at temperatures above 423 K and pressures of 50 to 100 MPa, appear to be significantly different from those observed along the liquid-vapor saturation curve.
AB - A new calorimetric technique, which combines a hydrothermal cold-seal pressure vessel and a Calvet-type microcalorimeter, provides direct enthalpy measurements of solutions at temperatures to 1073 K and pressures to 200 MPa. We report initial results for enthalpies measured for NaCl + H2O at temperatures of 985, 536, and 457 K and pressures of 51 and 100 MPa over a molality range of 0 to 6 mol kg-1. The partial molar enthalpies of NaCl, calculated from the results at temperatures above 423 K and pressures of 50 to 100 MPa, appear to be significantly different from those observed along the liquid-vapor saturation curve.
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U2 - 10.1016/0021-9614(79)90077-6
DO - 10.1016/0021-9614(79)90077-6
M3 - Article
AN - SCOPUS:49249153631
SN - 0021-9614
VL - 11
SP - 13
EP - 24
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
IS - 1
ER -