Compilation - Dichloromethane with Water (IUPAC SDS Volume 60)
SDS Volume (2469)
Volume 60. Halogenated Methanes with Water, p None
Original Measurements
Lincoff, A. H.; Gossett, J. M.; in Gas Transfer at Water Surfaces by Brutsaert, W.; Jirka, G. H.; Eds.; D. Reidel Publ. Co.; Dordrecht, 1984, p. 17-25.
Variables:
Room Temp: 293 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
Henry's law constants were determined by EPICS and Batch Air Stripping methods. The Equilibrium Partitioning in Closed Systems (EPICS) technique compared the GL peak heights upon direct injection of headspace samples. For the Batch Air Stripping procedure, equal volume samples were placed in serum bottles and allowed to reach equilibrium. The equilibrated headspaces containing concentrations proportional to original concentrations in the aqueous samples were analyzed. Full equilibrium was achieved in a few hours.
Source and Purity of Materials:
- Source and purity not given.
- distilled.
Estimated Errors:
Ambient temperature: ±0.1 K.
Mass concentration (m/v) (1): ±5 - 10%.
Components:
- Dichloromethane, $\ce{ CH2Cl2 }$; [75-09-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
loge H=-4191/T(K) + 8.200 (EPICS Method)
loge H=-4472/T(K) + 9.035 (Batch Air Stripping Method)
| $T$ (°C) | 100w1 | $x_{1}$ | $k_{\rm{D}}$ (m3 atm mol-1) |
|---|---|---|---|
| 20 | 1.7786 | 3.826 x 10-3 | 2.25 x 10-3 |
| 20 | 2.0314 | 4.379 x 10-3 | 1.97 x 10-3 |
