Thermodynamic Analysis of Solid−Solid and Solid−Liquid Equilibria in Binary Systems Composed of n -Alkanes: Application to the System Tricosane (C 23 H 48 ) + Pentacosane (C 25 H 52 )

This paper presents the elements needed to carry out thermodynamic assessments of phase equilibria in binary systems of normal alkanes in the range from hexadecane (C 16 H 34 ) to octacosane (C 28 H 58 ) and so for the transition from the ordered mixed solid state to the mixed rotator state: the methodology of the computations and the transition properties of the pure component substances as a function of chain length. The proposed approach is applied to the system tricosane (C 23 H 48 ) + pentacosane (C 25 H 52 ), for which the basic experimental phase diagram data are presented.