Excess thermodynamic properties of binary mixtures of ethyl acetate with benzene, ethanol, and 2,2,2-trifluoroethan-1-ol at 298.15 K

Excess enthalpies, excess isobaric heat capacities, densities and speeds of sound of the mixtures, ethyl acetate + benzene, +ethanol, and +2,2,2-trifluorethan-1-ol, were measured at 298.15 K. The densities were also measured at 303.15 K. The excess volumes were estimated from the density, and the isentropic and isothermal compressibilities and the isochoric heat capacities were estimated from the density, the speed of sound and the isobaric heat capacity. HmE and Cp.mE of the CH3COOC2H5 + CF3CH2OH system are large and negative, their minimum values are about −615 J mol−1 and −8.3 J K−1 mol−1. On the other hand, the VmE, κSE and κTE values for this mixture are very large and positive, the maxima are 1.1 cm3 mol−1, 90 TPa−1, and 117 TPa−1 respectively. All of those can be attributed to unlike association and destruction of the cluster structure in pure CF3CH2OH by mixing. HmE and Cp.mE of CH3COOC2H5 + C2H5OH are also large but positive, their maximum values are about 1320 J mol−1 and 7.3 J K−1. However, the VmE, κSE and κTE values are very small. As for the CH3COOC2H5 + C6H6 system, HmE, Cp.mE and also VmE, κSE and κTE are very small due to just induced dipole-dipole interaction.