Chemical Thermodynamic Properties of Compounds of Sodium, Potassium and Rubidium: An Interim Tabulation of Selected Values.

Selected values are given for the thermochemical properties of the more common compounds of sodium and potassium. A more extensive set of selections is provided for rubidium compounds. The properties included, where data are available, are enthalpy of formation at O K and 298.15 K, delta Hf(O) and delta Hf(298), Gibbs energy of formation, entropy and heat capacity at 298.15 K; delta Gf(298), S(298) and Cp(298), and the enthalpy difference between O K and 298.15 K, H(298) -H(O). The values are consistent with the tables issued earlier in the NBS Technical Note 270 series. (Author)