Determination and correlation of excess molar enthalpies of the binary carbon dioxide + ethyl acetate system at 298.15 to 308.15 K and 5.0 to 7.0 MPa

Excess molar enthalpies (HE) of the carbon dioxide + ethyl acetate system were measured near the critical point of carbon dioxide using a flow-type isothermal microcalorimeter at 298.15–308.15 K and 5.0–7.0 MPa. Mixtures showed strong exothermic behavior in these regions. The maximum absolute value of HE (maximum exothermic value) was about 8.5 kJ mol−1 at 298.15 K and 5.0 MPa. A two-phase region, where HE varied linearly with composition, was found in the CO2-rich region at all temperatures and pressures except at the condition 298.15 K and 7.0 MPa.