The thermodynamics of zinc sulphide transport in hydrogen chloride by modified entrainment

Abstract

The equilibrium ZnS(c, sphalerite) + 2HCl(g) = ZnCl2(g) + H2S(g) was studied by modified entrainment in the temperature range 1023 to 1263 K and the free energy equation, ΔG0/J mol−1 = (95060 ± 2700) − (38.7 ± 2.4)T, was obtained. A free energy equation for the corresponding equilibrium, ZnS(c, sphalerite) + 2HCl(g) = ZnCl2(1) + H2S(g), was derived using ancillary thermodynamic data, ΔG0/J mol−1 = (−28340 ± 2800) + (85.6 ± 2.4)T, (638–978 K).