Thermodynamics of the hydration of non-polar substances

• We re-examine the numerical value and physical significance of TS , the temperature where the entropy of transfer Δ WLCP fitting function. It is concluded that the interpretation of TS as the temperature where hydration ceases cannot be sustained. As previously reported [R.L. Baldwin, N. Muller, Proc. Natl. Acad. Sci. USA, 89 (1992) 7110], hydration must vanish at a temperature T1 >TS, where its experimental manifestation, i.e., ΔWL CP, is zero. We discuss the concept of water relaxation around a non-polar solute molecule and its relation to the hydration process.

Nyckelord

Hydrophobic effect

Aqueous solutions

Protein folding.

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