What is Thermodynamics?
Thermoynamics is the science of interaction between material and matter:
It describes how adding/removing heat or changing the chemical environment (adding/removing a solvent) changes the properties of a mixture.
Adding heat to water will evaporate it
Adding water to salt will dissolve it
Separation of mixtures is generally based on one of the two following phenomena:
The reactivity of a compound depends on temperature, but also on its surrounding
Electrolytes are species that tend to loose or gain electrons when dissolved into a solvent (typically with a large dielectric constant, as water).
Consequences of this phenomenon are large: