TY - JOUR
T1 - PVT properties of concentrated aqueous electrolytes. II. Compressibilities and apparent molar compressibilities of aqueous NaCl, Na2SO4, MgCl2, and MgSO4 from dilute solution to saturation and from 0 to 50°C
AU - Millero, Frank J.
AU - Ricco, J.
AU - Schreiber, Donald R.
PY - 1982/10/1
Y1 - 1982/10/1
N2 - The relative sound velocities (U-U°) of aqueous NaCl, Na2SO4, MgCl2, and MgSO4 solutions were measured from 0.05m to saturation and from 0 to 45°C. The sound speeds were combined with our earlier work and fitted to a function of molality and temperature to standard deviations within 0.3 m-sec-1. The adiabatic compressibilities, βs, were determined from the sound speeds and used to calculate adiabatic apparent molar compressibilities, Kφ{symbol},s, isothermal compressibilities, β, and apparent molar compressibilities, Kφ{symbol}, were determined from the adiabatic values using literature data for expansibilities and heat capacities. The values of Kφ{symbol} have been extrapolated to infinite dilution using an extended limiting law. The resulting K0 at various temperatures are in reasonable agreement with literature values. The results of this study have been combined with our earlier results to derive a secant bulk modulus equation of state for NaCl, Na2SO4, MgCl2, and MgSO4 solutions valid from 0 to 50°C and 0 to 1000 bar.
AB - The relative sound velocities (U-U°) of aqueous NaCl, Na2SO4, MgCl2, and MgSO4 solutions were measured from 0.05m to saturation and from 0 to 45°C. The sound speeds were combined with our earlier work and fitted to a function of molality and temperature to standard deviations within 0.3 m-sec-1. The adiabatic compressibilities, βs, were determined from the sound speeds and used to calculate adiabatic apparent molar compressibilities, Kφ{symbol},s, isothermal compressibilities, β, and apparent molar compressibilities, Kφ{symbol}, were determined from the adiabatic values using literature data for expansibilities and heat capacities. The values of Kφ{symbol} have been extrapolated to infinite dilution using an extended limiting law. The resulting K0 at various temperatures are in reasonable agreement with literature values. The results of this study have been combined with our earlier results to derive a secant bulk modulus equation of state for NaCl, Na2SO4, MgCl2, and MgSO4 solutions valid from 0 to 50°C and 0 to 1000 bar.
KW - MgCl
KW - MgSO
KW - NaCl
KW - NaSO
KW - compressibilities
KW - equations of state
KW - partial molar compressibilities
KW - sound speeds
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U2 - 10.1007/BF00645335
DO - 10.1007/BF00645335
M3 - Article
AN - SCOPUS:0000353831
VL - 11
SP - 671
EP - 686
JO - Journal of Solution Chemistry
JF - Journal of Solution Chemistry
SN - 0095-9782
IS - 10
ER -