be seen from these tables, the density decreases as the temperature
increases. Furthermore, an increase in density with the increase of
both the NaCl and urea concentrations can be observed.
Table 8 shows the AARD, which was obtained from the prediction
of density data by using ePC-SAFT for aqueous urea/NaCl
systems at different temperatures. It is obvious from this table that
the model can precisely predict the experimental values without
introducing any new adjustable parameters. The variation of the
density with NaCl concentration is depicted in Fig. 1 at 293.15 K