Abstract
The relationship between cavity thermodynamics in water and air-water surface tension is investigated in the present study. The effective hard sphere diameter of water molecules over a large temperature range is estimated from the experimental air-water surface tension, and cavity thermodynamics is calculated by means of classic scaled particle theory. The work of cavity creation proves to be a decreasing function of temperature and the cavity entropy change is a positive, practically constant, quantity, regardless of the cavity diameter, in marked contrast with well established theoretical and computer simulation results. This finding suggests that the relationship between cavity thermodynamics and surface tension is not a simple matter in the case of water.
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