Excess molar volumes of (2, 5, 8, 11-tetraoxadodecane + propyl formate or methyl propanoate) at the temperatures (278.15, 288.15, 298.15, and 308.15) K and atmospheric pressure were obtained from density measurements with a vibrating-tube densimeter. Excess molar isobaric heat capacities of (2, 5, 8, 11-tetraoxadodecane + propyl formate) at the temperatures (288.15, 298.15, and 308.15)K and atmospheric pressure were determined with a differential scanning calorimeter. The results are compared with literature values of binary mixtures containing C4H8O2 ester isomers.