The excess thermodynamic melting properties of the mixed crystalline rotator form of binary mixtures of neighbours and nextnearest neighbours of n-alkanes in the range to are characterized by a uniform temperature of enthalpy/entropy C 11 H 24 C 26 H 54 compensation of 320 K. Excess enthalpy di †erences have been obtained by microcalorimetry and excess Gibbs energy di †erences by phase diagram analysis and the two properties were combined to give the excess entropy di †erences. The excess enthalpy and excess entropy di †erences are negative and their absolute values, which are virtually equal to the excess properties of the rotator form, increase with increasing relative mismatch between the crystallographic unit cells of the two components involved.
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