Heat Capacity Measurements of 13 Methyl Esters of n-Carboxylic Acids from Methyl Octanoate to Methyl Eicosanoate between 5 K and 350 K

Molar heat capacities of 13 methyl esters of the linear carboxylic acids from methyl octanoate to methyl eicosanoate were measured from 5 K to 350 K. The derived thermodynamic functions S abs,m ( T ) and H m ( T ) − H (0) were calculated. A correlation function for the absolute entropy at 298.15 K was found to be S abs ( n,298.15 K) = {215.94 + 31.517 n } J·K -1 ·mol -1, with n being the number of carbon atoms in the parent carboxylic acid minus one. The heat capacity of the liquid phases in the temperature range of 250 K to 350 K can be described by C p ( n, T ) = {103.16 + 16.273 n + 0.04735 n ( T /K)} J·K -1 ·mol -1, with a mean absolute percentage deviation of 0.3%.