The vapour pressure above liquid tin(II) chloride has been measured (599 to 891 K) by the quasistatic method. The partial pressures of SnCl 2, Sn 2Cl 4, and SnCl 4 were derived from the vapour pressure and the corresponding mole fractions. The molar enthalpy for the evaporation of tin(II) chloride has been calculated by the second-law and third-law methods. The temperature variation of the change in the standard molar Gibbs free energy for the formation of SnCl 2(g) from Sn(g) and Cl 2(g) has been derived (298 to 6000 K).