E.m.f. of cells

Grin. mols. HCl per 1000 grms. E.M.F. of cells. Free energy decrease in cell reaction—joules. ... 

The scheme of the cell for carrying out the potentiometric study by the proposed method can be presented as follows (the cell structure provides simultaneous independent measurements of e.m.f. of cells 1 -2 and 1 - 3 at two pairs of potentiometer contacts) ... 

The temperature dependence of the e.m.f. of cells including tellurium iodides was determined Agl was used as an auxiliary electrolyte the chemical po-... 

Table 5. E.m.f. of cell reactions Ej, E2 and Es 8 in terms of A and B of Eq. (15). Electrochemical valency, (n), tempoature range and number of points used for the linear fit are indicated.

For the case where 5i = HgO and S2 = organic solvent, the e.m.f. of cell (III) contains a term which is related to the standard free... 

The standard e.m.f. of cell (Va) in pure ethanol has been discussed above. The thermodynamic quantities for this cell in various EtOH-H20 mixtures are given in Appendix 2.7.5A. The activity coefficients of... 

While arguments have been presented to discount these complicating factors, they are not based upon experimental evidence and the complications may therefore be present. There is no doubt that the data obtained from the e.m.f. of cells without liquid junctions are more reliable than the solubility data. In Table 2.11.11 below, the free energies of transfer of HCl and KCl obtained by summing the individual contributions of each ion are given. The accepted values of AG (HC1) and AG (KC1) are those based on the e.m.f. data (see E75, E81 and sect. 2.6.5). 

The detailed theory and mode of operation of the main experimental methods of obtaining transference numbers—Hittorf, direct and indirect moving boundary, analytical boundary, e.m.f. of cells with transference or of cells in centrifugal fields— have been published elsewhere. Only the features particularly pertinent to work with electrolytes in organic solvents will be dealt with here. 

To test the hypothesis that an electroendosmosis takes place in the formation of foam bodies and hollow spheres the E.M.F. of cells of the following type was also determined ... 

The use of optical properties is of course restricted to a limited selection of acid-base systems, and methods of more general applicability are based on the properties of the hydronium ion, in particular the e.m.f. of cells... 

Table 5 was compiled in 1958, and includes most of the data of sufficient accuracy and reliability then available, mostly obtained from studies of the e.m.f. of cells. It could now be considerably extended, especially by the addition of values derived from modern conductivity measurements and from calorimetry, and in a few instances the thermodynamic parameters could be replaced by more accurate ones. However, the picture would not be changed by such a revision, and the original table has therefore been retained for the purpose of our semi-quantitative discussion. Extensive tables of thermodynamic parameters for protolytic reactions in water have been recently compiled by Christensen and by Larsen and Hepler [J. W. Larsen and L. G. Hepler, in Solute-Solvent Interactions (ed. J. F. Coetzee and C. D. Ritchie), Dekker, New York, 1969]. 

Schick s work includes the study of borides, carbides, nitrides, and oxides of some elements in Groups IIA, IIIB, IVA, IVB, VB, VIIB, and VIII as well as selected rare earths and actinides. As far as possible, the tables have been made compatible with the JANAF tables. Among the subjects treated are phase diagrams, heat capacities, enthalpies, entropies, enthalpies of phase transformation, formation, and reaction, melting temperatures, triple points, free energies of formation, vapour pressures, compositions of vapour species, ionization and appearance potentials, e.m.f. of cells, and enthalpies of solution and dilution. Volume 1 summarizes the techniques used to analyse data and cites the data analysed, and Volume 2 gives tables of values produced by this study. 

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