Solubility of hex-1-ene, hexane and cyclohexane in liquid nitrogen

Abstract

The solubilities of hex-1-ene, hexane and cyclohexane have been measured in liquid nitrogen at a temperature of 77.4 K by the filtration method. The solubilities of the C₆ hydrocarbons in LN₂ at 77.4 K vary from 0.5 × 10^–8 mole fraction for cyclohexane, to 0.7 × 10^–8 mole fraction for hexane and 0.16 × 10^–6 mole fraction for hex-1-ene. The results are compared with the solubilities calculated on the basis of the Scatchard–Hildebrand equation of regular solution theory. Correlation between the solubilities of alkanes, alkenes and cyclic hydrocarbons in liquid nitrogen, and some properties of solutes {normal boiling point (T_b), critical point (T_c), heat of vaporization at normal boiling point (ΔH_b), the mean of the heat of vaporization and the enthalpy of melting [(ΔH_b+ΔH_m)/2] and Lennard–Jones force constant (ε/k_B} are presented.