The mathematical-physical equation concerning the process of calorimetry of electrode reactions was deduced, and the corresponding
solutions were obtained respectively for the period of the electrochemical polarization and that of the natural cooling. The
calorimetry of the anodic oxidation of ferrocyanide to ferricyanide under linear sweep-current polarization was carried out,
the obtained apparent enthalpy change of the electrode reaction agreed well with that obtained by the calorimetry with constant
currents. The developed calorimetry with linear sweep-current and the data processing method are applicable for quick determination
of apparent enthalpy changes of electrode reactions.