Abstract
AbstractA method is proposed for calculating retention indices of apolar solutes on apolar stationary phases from the vapour pressures of the solutes and the molar volumes of the solutes and the solvent. Retention indices calculated by this method, as well as values calculated otherwise, are compared with experimental data.The temperature dependence of the retention indices is discussed from a thermodynamic standpoint.The corresponding standard partial molar entropies, enthalpies and free enthalpies of vaporization from solution appear to depend on molecular size and shape. The latter phenomenon is contributed to more or less shielded solute‐solvent interactions and to less or more restricted molecular translation and rotation.
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