SDS Volume (2568)
Volume 60. Halogenated Methanes with Water, p None
Original Measurements
Hunter-Smith, R. J.; Balls, P. W.; Liss, P. S.; Tellus 35B, 170 (1983).
Variables:
Room Temp: 278 - 306 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The multiple equilibrium technique was used to measure the Henry's law constant (H) as described by McAuliffe [1]. A known volume of seawater in a syringe was shaken with a known volume of tetrachloromethane. After equilibration, the headspace was separated and analyzed for tetrachloromethane. A gas chromatograph with an electron capture detector was used for the analysis.
Source and Purity of Materials:
- Source and purity not given.
- Samples from 48° N to 65° S in the Atlantic 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:
- Tetrachloromethane, $\ce{ CCl4 }$; [56-23-5] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The Henry's law constant (H) was derived from the best-fit lines of van't Hoff plots:
loge H = - 3230/T(K) + 11.27
| $T$ (°C) | 100w1 | $x_{1}$ | $k_{\rm{D}}$ |
|---|---|---|---|
| 5 | 0.05596 | 6.557 x 10-5 | 0.7100 |
| 10 | 0.05759 | 6.748 x 10-5 | 0.8716 |
| 15 | 0.05911 | 6.927 x 10-5 | 1.0624 |
| 20 | 0.06049 | 7.088 x 10-5 | 1.2863 |
| 25 | 0.06180 | 7.242 x 10-5 | 1.5473 |
| 33 | 0.06625 | 7.763 x 10-5 | 2.0536 |
