Density and speed of sound of four binary mixtures bromotrichloromethane + n-heptane, dibromomethane + n-heptane, bromotrichloromethane + dibromomethane, and bromotrichloromethane + bromochloromethane were measured over the entire range of composition in the temperature range from T = 293.15 K to T = 313.15 K. Excess molar volumes and deviation in isentropic compressibility have been calculated from experimental measurements and fitted to a Redlich-Kister equation to derive binary coefficients and the standard deviation.