** Walther Hermann Nernst**
(**born: June 25, 1864** / **died: November 18, 1941**)

Nernst contributed greatly to electrochemistry, thermodynamics, solid
state chemistry and photochemistry. Amongst his most notable discoveries were
his "heat theorem", also known as the Third law of thermodynamics and the
Nernst equation In electrochemistry, the Nernst equation (named after German physical
chemist Walther Nernst) gives the reversal potential of an electrode E, relative
to the standard electrochemical potential, E ^{0}, of the electrode
couple or, equivalently, of the half cells of a battery where R is
the universal gas constant, T the temperature in Kelvin, z the charge number
or valence of the electrode reaction, and a the chemical activities on the
reduced and oxidized side, respectively. F is the Faraday constant, equal
to 96,485 C mol^{-1}. |