Quantitative solubility data for the system 2-methylpentane (1) and water (2) have been reported in the publications listed in Table 1.

The original data in all of these publications are compiled in the data sheets immediately following this Critical Evaluation.

Connolly (ref 1) has reported solubilities of (1) in (2) at elevated pressures (Table 1) and determined an upper critical solution temperature of 625K at 31 MPa. However, as no other data are available under comparable conditions, no critical evaluation of his results can be made. The interested user is referred to the relevant Data Sheets for experimental values. For convenience, further discussion of this system will be divided into two parts.



1. SOLUBILITY OF 2-METHYLPENTANE (1) IN WATER (2)

The solubility data for 2-methylpentane in water are listed in Table 2 and plotted in Figure 1 with the exceptions noted below.

The datum of Krzyzanowska and Szeliga (ref 6) has been excluded because it does not appear to be independent of that of Price (ref 5). The data of Connolly (ref 1) have already been discussed above.

The datum of Polak and Lu (ref 4) at 298K is somewhat higher than those reported by others (ref 2, 3, 5). Also their value at 273K, as with other hydrocarbons investigated by these authors, shows an unusually large increase over the value at 298K. Their data are therefore rejected. At temperatures other than 298K only the data of Price (ref 5) are available and thus must be considered 'Tentative'.



2. THE SOLUBILITY OF WATER (2) IN 2-METHYLPENTANE

The solubility of water in 2-methylpentane has been reported only by Polak and Lu (ref 4) and thus no Critical Evaluation can be made. However, it can be noted that the data of these authors are generally close to "Recommended" values in well characterized systems. The interested user is referred to the appropriate data sheet for solubility values.