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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Heptane with Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Heptane; C7H16; [142-82-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Jonsson, J.A.; Vejrosta, J.; Novak, J., Fluid Phase Equil. 1982, 9, 279-86.
Variables:
Temperature = 15-35 °C
Prepared By:
G.T. Hefter
Experimental Data:
(Notes on the Nomenclature)
Solubility of heptane in water
t/°C
10
3
* g
1
/kg
10
4
* g
1
/100 g solution (compiler)
10
7
* Mole Fraction x
1
(compiler)
15
2.67
2.67
4.80
20
2.57
2.57
4.62
25
2.51
2.51
4.51
30
2.49
2.49
4.47
35
2.52
2.52
4.53
Notes:
Table 1
a
Solubility values were calculated by the authors from their smoothed air-water partition coefficient (K
AW
) by assuming K
AW
values obtained at infinite dilution were valid at the saturation pressure of (1).
Method/Apparatus/Procedure:
Air-water partition coefficents were measured by saturating a portion of water by a stream of nitrogen containing a known vapour concentration of 91). After equilibration, the dissolved (1) was absorbed in a porous polymer trap and the entrapped (1) analysed by gas chromatography. The method and apparatus are described in detail in ref 1.
Source and Purity of Materials:
(1) Fluka, >99.7%, used as received.
(2) Not specified.
Estimated Errors:
Temperature: Not specified.
References:
1
Vejrosta, J.; Novak, J.; Jonsson, j.A. Fluid Phase Equil. 1982, 8, 25-35.