Figure 2. Gibbs free energy of mixing as a function of the volumetric fraction of seawater (χ), calculated at 298 K, mixing a 0.6Msolution and a 0.024 M solution for per unit volume of (a) final solution and (a) low concentration solution. (c) Estimated extractable power (GW) from the
difference of salinity in different countries, based on flow of river water emptying into the ocean.