Components:
(1) Heptane,
C7H16; [142-82-5]
NIST WebBook
(2) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Jonsson, J. A.; Vejrosta, J.; Novak, J.; Fluid Phase Equilib. 1982, 9, 279-86.
Variables:
Ambient temperature: 15 - 35 °C
Prepared by:
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:
- Fluka, >99.7%, used as received.
- not specified.
Estimated Errors:
Ambient temperature: Not specified.
References
1 Vejrosta, J.; Novak, J.; Jonsson, J. A.; Fluid Phase Equil. 1982, 8, 25-35.
Experimental Values:
Note: Solubility values were calculated by the authors from their smoothed air-water partition coefficient (KAW) by assuming KAW values obtained at infinite dilution were valid at the saturation pressure of (1).Solubility of heptane in water
| T (°C) | MR1 (mg/kg) | x1a | MR1 (g1/100 g sln)a |
|---|---|---|---|
| 15.0 | 2.67 | 4.80 x 10-7 | 2.67 x 10-4 |
| 20.0 | 2.57 | 4.62 x 10-7 | 2.57 x 10-4 |
| 25.0 | 2.51 | 4.51 x 10-7 | 2.51 x 10-4 |
| 30.0 | 2.49 | 4.47 x 10-7 | 2.49 x 10-4 |
| 35.0 | 2.52 | 4.53 x 10-7 | 2.52 x 10-4 |
(a) These values were calculated by the compiler.
