. Can. J. Chem. 64,926 (1986). The results of heat capacity (C,) and density (d) measurements at 0.6 MPa and in the temperature range 298.15-373.15 K are presented for several 1:l electrolytes in water. The flow microcalorimeter and densimeter used for these measurements were modificatons of the room-temperature designs. Data were obtained over concentrations ranging from 0.02 to 1 . O mol kg-' (or to the solubility limit, whichever was lower). The heat capacity of a solution relative to that of water was measured with a precision of kO.l mJ K-' g-' at all temperatures. The density of a solution relative to that of water was measured with a precision of ?5 pg ~m -~. These C, and dresults were used to calculate the apparent molar heat capacities, +c,, and volumes, +v, at 298.15, 323.15,348.15, and 373.15 K, at a constant pressure of 0.6 MPa. These results are in good agreement with available literature data.
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