Heat of formation of the surface of an ideally polarizable electrode

The heat Q(surf), which is necessary to impart to an ideally polarizable su rface during its thermodynamic formation at specified pressure and temperat ure, is analyzed. The equation for Q(surf) is shown to be successfully veri fied for its consistency with both the Gibbs basic electrocapillary equatio n and the Gibbs-Helmholtz equation for the heat effect of an electrochemica l cell. The quantity Q(q)(surf), which is a derivative of Q(surf) with resp ect to the electrical charge q of the surface, can be determined experiment ally and coincides, up to a sign, with the Peltier heat of an ideally polar izable electrode.