SOLUBILITY OF GASES IN LIQUIDS .20. SOLUBILITY OF HE, NE, AR, KR, N-2, O-2, CH4, CF4, AND SF6 IN N-ALKANES -LESS-THAN-OR-EQUAL-TO-L-LESS-THAN-OR-EQUAL-TO-16) AT 298.15 K(2 (6)

The Ostwald coefficients L(2,1) of He, Ne, Ar, Kr, N-2, O-2, CH4, CF4, and SF6 dissolved in several homologous n-alkanes, n-ClH2l+2, 6 less than or equal to l less than or equal to 16, have been measured at 298 .15 K and atmospheric pressure with a modified Ben-Naim/Baer apparatus . Altogether, 99 gas/liquid systems were investigated. Both pressure c ontrol and measurement of the volume of gas dissolved in a given volum e of solvent were controlled by a microprocessor. This improved, mediu m-precision apparatus (the imprecision is approximately +/-0.5%) combi nes easy handling with automated data retrieval and is totally mercury -free. Data reduction is presented in some detail, including the estim ation of auxiliary quantities, such as second virial coefficients and partial molar volumes at infinite dilution. The effect of chain length I upon solubility is shown, and some correlations between L(2,1), or the derived Henry fugacities H-2,H-1, and appropriate molecular and/or bulk properties of the gases and n-alkanes are discussed.