Isobaric thermal expansion and isothermal compressibility of ethylbenzene + n-hexane,and + n-octane at 25 and 45°C

Isobaric thermal expansion _p, and isothermal compressibility _p have been determined for binary mixtures of ethylbenzene + n-hexane, and + n-octane in the complete range of composition at 25 and 45°C. The corresponding excess quantities obtained at each measured mole fraction are negative for both systems and show minima at or around equimolecular composition. Absolute values of those excess functions decrease with the chain length of the n-alkane and increase with temperature. Combining these experimental results with data for the heat capacity at constant pressure the isentropic compressibility and the heat capacity at constant volume were calculated at 25°C. The corresponding excess quantities are negative, showing maxima around mole fraction 0.5 and their absolute values decrease for _S ^E and increase for C _V with increasing chain length.