**6. Conclusion**

98 Electrochemical Cells – New Advances in Fundamental Researches and Applications

transformations in solid state. Line S'1 corresponds to solid solution on the base of Pb2Pd phase. Points of intersections of the lines Si with curves Li correspond to the eutectic or peritectic transformations. Points of intersections of the E(T) for liquid homogeneous region with curves L2-L6 correspond to the points of liquidus. Invariants points (Te = 721K and Tm

Fig. 22. Equilibrium phase diagram of the palladium-lead with our corrections.

Fig. 23. General trend of experimental EMF results versus temperature and composition for

the Pb-Pd system.

(Pb2Pd) = 725K) were shown in the Fig.22 and 23.

The accuracy of the proposed experimental technique does not yield the best calorimetric measurements and completeness of the information obtained by the EMF exceeds the calorimetric methods in some case. So, the proposed variant of the EMF can be called as universal and self-sufficient, and the cost of equipment used in the EMF method is much lower than the calorimetric one. EMF remains one of the most important methods in metallurgical thermodynamics.The method of electromotive force (EMF) with proposed electrocemical cells is a powerful tool to study the thermodynamic properties of metallic, semiconductor and oxyde systems. It permits to identify a set of values of the chemical potentials of one of the component of the different phases. The final result of this work consist of the thermodynamic optimization of the studied system.
