Abstract
Measured dielectric constants and molar densities are reported for a number of liquefied petroleum gas (LPG) components and mixtures at cryogenic temperatures (220–250 K) and at standard temperature 15.6° C). A tabulation of consistent component properties is presented. Volume changes on mixing are found to be less than about 0.1% of the mixture molar volumes for all systems studied at cryogenic conditions (c., 228 K). Somewhat larger contractions on mixing were observed for some propane-rich binary mixtures at 288.71 K (60°F). Results for all mixtures studied confirmed that a mole-fraction average of component Clausius-Mossotti function values can be used as an accurate estimate of the mixture CM value. Molar densities calculated under this rule agree with measured values within 0.2%.
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