SDS Volume (3188)
Volume 67. Halogenated Ethanes and Ethenes with Water, p 537
Original Measurements
Hunter-Smith, R. J.; Balls, P. W.; Liss, P. S.; Tellus 35B, 170 (1983).
Variables:
Room Temp: 278 - 298 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The multiple equilibration technique was used to measure the Henry's law constant as described by McAuliffe [1]. A known volume of pure 1,1,1-trichloroethane in a syringe was shaken with a known volume of pure water. After equilibration, the headspace was separated and analyzed for the compound of interest. A gas chromatograph fitted with an electron capture detector was used for the analysis.
Source and Purity of Materials:
- Source and purity not given.
- Atlantic ocean samples, 48°N to 65°S latitudes, in late 1981.
Estimated Errors:
Ambient temperature: ±0.2 K.
Mass concentration (m/v) (1): ±5.5% std. dev.
References
1 McAuliffe, C. D.; Chem. Techn. 1971, 1, 46.
Components:
- 1,1,1-Trichloroethane, $\ce{ C2H3Cl3 }$; [71-55-6] NIST WebBook
- Seawater, $\ce{ H2O }$; [7732-18-5(C)] NIST WebBook
Experimental Data
The Henry's law constant (H, dimensionless) was derived from a van't Hoff plot best-fit equation: loge H=13.04-3905/(T/K)
| $T$ (°C) | 100w1 | $x_{1}$ | $k_{\rm{D}}$ (m3 atm mol-1) |
|---|---|---|---|
| 5 | 0.1002 | 1.354 x 10-4 | 0.3682 |
| 10 | 0.0992 | 1.341 x 10-4 | 0.4718 |
| 15 | 0.0979 | 1.324 x 10-4 | 0.5993 |
| 20 | 0.0966 | 1.305 x 10-4 | 0.7552 |
| 25 | 0.0950 | 1.284 x 10-4 | 0.9442 |
