Abstract
Values of (FoE0o)/T for sulphur dioxide are computed from spectroscopic data; the heat of formation of sulphur dioxide from diatomic sulphur and oxygen is calculated from the calorimetric heats of formation of sulphur dioxide and hydrogen sulphide, and Cross' value for the energy of dissociation of hydrogen sulphide. Equilibrium constants for the reactions 12S2(g)+O2=SO2,  SO+12O2=SO2 are tabulated for the range 298.1 to 2800°K.