Determination of partial molar entropies for individual ions

5 Determination of partial molar entropies for individual ions 

Note well when data on partial molar entropies are given they are usually in terms of the hydrogen ion written as H (aq). This section uses this convention so as not to be in conflict with tabulated data. In all other parts of the book, the standard procedure of writing the H+ in terms of H30 (aq) is used. 

The partial molar entropy of substance B in a solution relates to the dependence of the entropy of the solution on the amount of substance B in it. More precisely, it is the rate of change of S for the solution with change in amount of B present, with the change in amount of B being carried out at constant temperature, crxistant pressure and constant amount of every other substance. 

A5 can be found from the temperature dependence of the emf of the cell (see Worked Problem 8.11, Section 9.12.2 and Worked Problem 9.16). 

If other cells are used further standard partial molar entropies can be found. 

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