The effect of temperature and pressure on acoustic and thermodynamic properties of 1,4-butanediol. The comparison with 1,2-, and 1,3-butanediols

The speeds of sound in 1,4-butanediol have been measured in the temperature range from (298 to 318) K at pressures up to 101 MPa by the pulse-echo-overlap method. The densities have been measured in the temperature range from (293.15 to 353.15) K under atmospheric pressure with a vibrating tube densimeter. Based on the experimental results, the densities, isobaric heat capacities, isobaric coefficients of thermal expansion, isentropic and isothermal compressibilities, as well as the internal pressure as function of temperature and pressure have been calculated. The effects of pressure and temperature are discussed and compared with the previous results for 1,2- and 1,3-butanediols.

► Study of the (p, Vm, T) relation obtained by acoustic method for 1,4-butanediol. ► The comparison with 1,2- and 1,3-butanediols. ► The magnitude most of the properties: 1,2-butanediol > 1,3-butanediol > 1,4-butanediol. ► The temperature–pressure density data reported in form a Tait equation.