Analysis of thermochemical data of fatty acids and acetates on their base

Abstract

Abstract The heat of vaporization, combustion, formation, entropy in different phases and the heat of capacity of fatty carbonic acids and their acetates were analyzed and was determined that all functions of these types of compounds depend from the number of valence electrons N from which is excluded the sum of lone electron pairs g as represented in equations Δvap,f,c H° = i ± f (N – g) and S° (Cp ) = i ± f (N – g). The coefficients f in the first equations is in the range 108 – 109 kJ⋅mol−1 electron−1, that corresponds to the same values f in the equations, which are related to combustion processes. Other coefficient i is different for each type of compounds. The received new seven equations can be used for the calculation of the same thermodynamic functions for other organic and especially bioorganic substances with fatty radicals.