Apparent molar volumes and apparent molar heat capacities of aqueous silver nitrate at molalities from 0.015 mol(centre dot)kg~(-1) to 0.5 mol(centre dot)kg~(-1), at temperatures from 278.15 K to 393.15 K, and at the pressure 0.35 MPa

摘要

Densities of aqueous silver nitrate solutions were determined at molalities m from 0.015 mol(centre dot)kg~(-1) to 0.5 mol(centre dot)kg~(-1), at temperatures T from 278.15 K, and at the pressure 0.35 MPa, using a vibrating tube densimeter (DMA 512P, Anton Paar, Austria). A fixed cell, power-compensation, differential-output, temperature-scanning calorimeter (NanoDSC 6100, Calorimetry Sciences Corporation, American Fork, UT, USA) was used to measure the heat capacities of the same solutions at the same pressure and at 278.15 <= T/K <= 393.15. Apparent molar heat capacities C_(p,#phi#) and apparent molar volumes V_#phi# were calculated for these solutions and fitted by regression to empirical equations describing the surfaces (C_(p,#phi#),T,m) and (V_(#phi#),T,m).