ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Molar enthalpy of fusion and the degree of thermal dissociation of Na₃FSO₄

I. Koštenská and M. Malinovský

Department of Inorganic Technology, Slovak Technical University, 812 37 Bratislava

Abstract:  The value of molar enthalpy of fusion of complex compound Na₃FS0₄, which is formed in the system NaF—Na₂S0₄, was determined by the method of molten salt cryometry. The result is compared with the Sutra's rule. Calculation of the degree of thermal dissociation b₀ of pure compound Na₃FS0₄ showed that b₀ = 0.65—0.70 if the cryometric value ΔH^I (Na₃FS0₄) = 62.3 kJ mol^-1 is used. If the value ΔH^f (Na₃FS0₄) = 53 kJ mol^-1 (obtained by means of the Sutra's rule) is applied then b₀ equals 0.80—0.85.

Full paper in Portable Document Format: 362a151.pdf

Chemical Papers 36 (2) 151–157 (1982)