Thermodynamics of thallium alkanoates I. Heat capacity and thermodynamic functions of thallium(I) n-hexanoate

Abstract

The sub-ambient heat capacity of thallium(I) n-hexanoate is characterized by transitions at 203.5 and 208.3 K which show Cp, m/R maxima of about 400 and 2500 and ([Delta]Sm/R)'s of 1.03 and 1.07. Both appear to be essentially first order and show typical under-cooling phenomena. The heat capacities are in excellent accord with the d.s.c. values of Fernandez-Martin, Lopez de la Fuente, and Cheda over the common range of super-ambient values. At T = 298.15 K the values of {Smo(T)-Smo(0)}/R, {Hmo(T)-Hmo(0)}/R, and -{Gmo(T)-Hmo(0)}/RT are 39.06, 5880 K, and 19.33. Smoothed thermodynamic functions are tabulated through melting.