Speed of Sound, Density, and Compressibility of Alkylbenzenes as a Function of Pressure and Temperature:  Tridecylbenzene and Pentadecylbenzene

Speed of sound measurements were carried out in liquid tridecylbenzene and pentadecylbenzene at pressures from atmospheric up to 150 MPa in the temperature range from (293 to 383) K using a pulse technique operating at 3 MHz. Additional density measurements were performed up to 60 MPa. From these measurements, the density was evaluated up to 150 MPa and the isentropic compressibility was determined in the same P−T domain.