Heat capacities in some aqueous solutions

Abstract

The problem of properly evaluating the heat capacities of the constituents of aqueous solutions is discussed, and the methods of calculating, from specific heat data possessing the necessary qualifications, the apparent molal heat capacity of the solute, the partial molal heat capacity of the solute, and the partial molal heat capacity of the H2 are given. These partial molal quantities, evaluated from the specific heat data of Rich-ards, et al., on aqueous solutions of hydrochloric acid, sodium hydroxide, acetic acid, sodium acetate, calcium chloride, barium chloride, citric acid, monosodium dihydrogen citrate, disodium monohydrogen citrate, and sodium citrate are given in tabular and graphic form. The importance of the results in interpreting the behavior of ions and molecules in aqueous solution and their relation to the Debye-Hiickel theory of strong electrolytes are discussed.