Thermochemistry of Natural Hypersaline Water Systems Using the Urmia lake as a Case

Abstract

In order to study the heat effect of mixing of fresh waters (winter rains in the form of floods) with Urmia lakewater , the heats of mixing of Urmia lake water with distilled water at 25ºC have been measured. On the basis ofthese experimental data, the heats of dilution of freshwater in Urmia lake water and Urmia lake water in freshwater have been calculated. By considering the isothermal cycle of the dilution of Urmia lake water, the partialheat of evaporation of water from Urmia Lake water was found to be ca. 2443.58( ) 12 .?kJ kg H O at 25ºC.

Keywords: Heat of mixing; partial heat of evaporation; Urmia lake water; Dilution; natural hyper salinebrines.