Enthalpies of aqueous sodium chloride solutions from 32 to 350°F

✍ Scribed by James C.S. Chou; Allen M. Rowe Jr.

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 701 KB
• Volume: 6
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)80014-4

✦ Synopsis

If the infinite dilution is chosen as the reference state for the enthalpy of solute, I;: then becomes zero. It follows that the enthalpy h, of solution at 25°C and 1 atmosphere can be related to the mole fraction of solute and the iniegral heat of dilution by the equation The integral heat of dilution is also equal to the hear of formation of the solution in the 'final state minus that in the initial state. The heats of formation at 25°C and I atmosphere for various concentrations have been compiled by Rossini (1.2). In order to be consistent with the values in the steam tables, the value of iIy of Eq. (2) must be based on the convention of zero enthalpy for the saturated water at 0% and is taken to be 24.953 calories per gram at 25 "C and 1 atmosphere. The values of enthalpy have been caIculated from Eq. (2) for the concentrations Desalinnrion.