Thermal properties and apparent molar volumes Vϕ of ZnCl2 (aq) in high temperatures and pressures

The (p, ρ, T) and (ps, ρs, Ts) properties and apparent molar volumes Vϕ of ZnCl2 (aq) at T = (298.15 to 398.15) K, pressures up to p = 60 MPa were measured by the constant volume piezometer method. Experimental (p, ρ, T) and (ps, ρs, Ts) values were described by an equation of state. The apparent molar volumes of ZnCl2 at infinite dilution Vϕ0, isothermal compressibilities k and thermal expansivities α have been evaluated. An empirical correlation for apparent molar volumes Vϕ of zinc chloride in water with pressure, temperature and molality has been derived. The experiments were carried out at molalities m = (0.07627, 0.25375, 0.65853, 1.39371, 3.22953, and 7.71336) mol kg− 1 of zinc chloride.