Abstract
1. A law of the change in the differential molar free energy of sorption of n-alkanes as a function of the length of the chain, the polarity of the stationary phase (SP), and the temperature of analysis has been found. 2. The energy contribution of a methylene unit of an n-alkane changes hyperbolically with the chain length, rising to the first members of the series. The greatest contribution to the free energy of sorption of an n-alkane is made by the α-methylene unit, and then by the β- and γ-methylene units. 3. An equation has been proposed which permits the calculation of\(\Delta G_{n,av}^{CH_2 }\), the coefficients of which depend on the SP and the temperature of analysis. The energy contribution of each methylene unit in the interval studied depends linearly on the temperature.
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