Abstract
The variation of solubility with temperature in water is an important consideration in the design of crystallizations and other processes. Solubility was found to vary exponentially with temperature (in °C) for a literature data set of 50 organic molecules in water. This complements a similar recent finding for the solubility of organic molecules in organic solvents. The ‘solubility doubling temperature’ is a convenient way to express this variation and provides a numerical link between enthalpy of dissolution and yield. The ‘solubility doubling temperature’ in water varies with solute, and the median value from this data set is 21.4 °C, consistent with ‘Black’s rule’.
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