Metallic entropy against

This equation is called the relative thermoelectric power of the metal a against b . Since the transfer of entropy depends on the cross coefficients T12 or A2I, this derivation represents coupling between the electrical and thermal phenomena. 

Figure 4. Plot of the nonmagnetic crystal entropy against metallic radius...

For crystals the lower limit of the integral is zero from the considerations just outlined. Equation (57) may be integrated if a relation between Cp and T is known. The available analytical relations are. however, complicated and of limited validity. Fortunately values of S may be obtained from measurements of heat capacity at different temperatures by graphical methods, A convenient method is one proposed by Lewis and Gibson17 which consists in plotting values of Cp/T against T and determining the area of the enclosed plot. Such a plot is shown in Fig. 7 for tine estimation of the entropy of metallic silver, from the work of Eucken, Clusius and Woitinek.18 Below the lowest... 

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