The Heats of Solution of Hexamethylbenzene, Cetyl Alcohol, and Dicetyl in Related Liquids; Heats of Fusion by an Extrapolation Process

摘要

The heats of solution of crystalline hexamethylbenzene, cetyl alcohol, and dicetyl in various related liquids have been obtained at 25°C. Benzene, toluene, xylene, and mesitylene have been used as solvents for hexamethylbenzene, and a value for the heat of fusion of this substance has been deduced from these heats of solution by an extrapolation process. Similarly, a series of alcohols (methyl, ethyl,n‐butyl,n‐heptyl, andn‐dodecyl) have been used for the solution of cetyl alcohol. Solubility limitations, however, made it impractical to employ any liquid paraffin exceptn‐heptane in the case of dicetyl. The heats of fusion at 25°C, as estimated from the present solution experiments, are per gram: hexamethylbenzene, 29.0±0.3 cal.; cetyl alcohol, 48.2±0.7 cal.; and dicetyl (dotriacontane), 58.7±1.2 cal.