Abstract
The enthalpies of dilution of aqueous solutions of RbCl, CsCl, NaF, NaBr, NaI, CaCl2, SrCl2, BaCl2, NaHCO3, and Na2CO3 in the molality range 0.1 to 1.0 mol kg-1 have been determined at 303.15 K with a microcalorimeter. The relative apparent molar enthalpies Lφ of these solutions have been determined with the aid of an extended form of the Debye-Hückel limiting law: Lφ = SHI 1 2[{1 + (I/mθ) 1 2}-1 - σ/3] + BI + CI 3 2, where SH is the limiting-law slope, σ = "; 3 ( I m⊖) 3 2';[";1 + ( I m⊖) 1 2'; - ";1 + ( I m⊖) 1 2';-1 - 2 ln";1 + ( I m⊖) 1 2';], B and C are empirical constants, I is ionic strength, and m⊖ is a standard molality (1 mol kg-1). This equation fits the experimental results with a standard deviation of ±2 calth mol-1 for all the salts. The parameters B and C were examined by relating them to properties of the ions that make up the various electrolytes; B was found to be linearly related to the reciprocal of the crystallographic radius and C was found to be directly related to B.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1067-1078 |
| Number of pages | 12 |
| Journal | Journal of Chemical Thermodynamics |
| Volume | 7 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1975 |
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- Physical and Theoretical Chemistry
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The enthalpy of dilution of some 1-1 and 2-1 electrolytes in aqueous solution. / Leung, Wing H.; Millero, Frank J.
In: Journal of Chemical Thermodynamics, Vol. 7, No. 11, 1975, p. 1067-1078.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The enthalpy of dilution of some 1-1 and 2-1 electrolytes in aqueous solution
AU - Leung, Wing H.
AU - Millero, Frank J
PY - 1975
Y1 - 1975
N2 - The enthalpies of dilution of aqueous solutions of RbCl, CsCl, NaF, NaBr, NaI, CaCl2, SrCl2, BaCl2, NaHCO3, and Na2CO3 in the molality range 0.1 to 1.0 mol kg-1 have been determined at 303.15 K with a microcalorimeter. The relative apparent molar enthalpies Lφ of these solutions have been determined with the aid of an extended form of the Debye-Hückel limiting law: Lφ = SHI 1 2[{1 + (I/mθ) 1 2}-1 - σ/3] + BI + CI 3 2, where SH is the limiting-law slope, σ = "; 3 ( I m⊖) 3 2';[";1 + ( I m⊖) 1 2'; - ";1 + ( I m⊖) 1 2';-1 - 2 ln";1 + ( I m⊖) 1 2';], B and C are empirical constants, I is ionic strength, and m⊖ is a standard molality (1 mol kg-1). This equation fits the experimental results with a standard deviation of ±2 calth mol-1 for all the salts. The parameters B and C were examined by relating them to properties of the ions that make up the various electrolytes; B was found to be linearly related to the reciprocal of the crystallographic radius and C was found to be directly related to B.
AB - The enthalpies of dilution of aqueous solutions of RbCl, CsCl, NaF, NaBr, NaI, CaCl2, SrCl2, BaCl2, NaHCO3, and Na2CO3 in the molality range 0.1 to 1.0 mol kg-1 have been determined at 303.15 K with a microcalorimeter. The relative apparent molar enthalpies Lφ of these solutions have been determined with the aid of an extended form of the Debye-Hückel limiting law: Lφ = SHI 1 2[{1 + (I/mθ) 1 2}-1 - σ/3] + BI + CI 3 2, where SH is the limiting-law slope, σ = "; 3 ( I m⊖) 3 2';[";1 + ( I m⊖) 1 2'; - ";1 + ( I m⊖) 1 2';-1 - 2 ln";1 + ( I m⊖) 1 2';], B and C are empirical constants, I is ionic strength, and m⊖ is a standard molality (1 mol kg-1). This equation fits the experimental results with a standard deviation of ±2 calth mol-1 for all the salts. The parameters B and C were examined by relating them to properties of the ions that make up the various electrolytes; B was found to be linearly related to the reciprocal of the crystallographic radius and C was found to be directly related to B.
UR - http://www.scopus.com/inward/record.url?scp=33751144882&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33751144882&partnerID=8YFLogxK
U2 - 10.1016/0021-9614(75)90240-2
DO - 10.1016/0021-9614(75)90240-2
M3 - Article
AN - SCOPUS:33751144882
VL - 7
SP - 1067
EP - 1078
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
SN - 0021-9614
IS - 11
ER -