The heat capacity of ethyl decanoate in the interval of (5 to 370) K was measured in an adiabatic calorimeter. The triple-point temperature T(fus) = (253.60 +/- 0.02) K and the enthalpy of fusion Delta(liq)(cr)H(m)degrees = (32.29 +/- 0.04) kJ.mol(-1) were determined. The vapor pressure over liquid ethyl decanoate in the interval of (294 to 323) K was measured by the Knudsen method. The calorimetric enthalpy of vaporization Delta(g)(liq)H(m)degrees(304.8 K) = (69.9 +/- 0.7) kJ.mol(-1) was determined in an MID-200 Calvet-type microcalorimeter. The standard enthalpy of formation for liquid ethyl decanoate at 298.15 K Delta(f)H(m)degrees(liq) = (-682.7 +/- 2.4) kJ.mol(-1) was determined in a static bomb combustion calorimeter. From these data, the standard enthalpy of formation for gaseous ethyl decanoate was evaluated to be Delta(f)H(m)degrees(g) = (-612.2 +/- 2.4) kJ.mol(-1). The formation enthalpy was also calculated using quantum chemical methods via homodesmic reactions at different theory levels. The results are in excellent agreement with the experimental value.