Thermodynamic properties of ammonium haloplatinates I. Heat capacity and thermodynamic functions of ammonium hexachloroplatinate (NH4)2PtCl6 from 6 K to 348 K

摘要

The heat capacity of ammonium hexachloroplatinate (NH4)2PtCl6 was measured from 6 K to 348 K by adiabatic calorimetry. The heat-capacity curve is sigmate without anomalies. It rises rapidly from T -- 0 to 250 K where the Cp,m/R value is 30.1 and increases by only 7 per cent from 250 K to 350 K. Values of the standard thermodynamic quantities are tabulated to 350 K.