Excess molar Gibbs free energies (G(E)) and ultrasonic speeds for 1,2-dibromoethane (1) + cyclohexane (2) or tetrachloromethane (2) over the whole composition range have been measured experimentally at 298.15 K. The values of isentropic compressibility (K(s)) and excess isentropic compressibility (K(s)E) have been evaluated from ultrasonic speeds, and excess Gibbs free energies are calculated for the vapor pressure by using Barker’s method.