Beryllium thermodynamic data

Although the entire discussion of electrochemistry thus far has been in terms of aqueous solutions, the same principles apply equaly well to nonaqueous solvents. As a result of differences in solvation energies, electrode potentials may vary considerably from those found in aqueous solution. In addition the oxidation and reduction potentials characteristic of the solvent vary with the chemical behavior of the solvent. as a result of these two effects, it is often possible to carry out reactions in a nonaqueous solvent that would be impossible in water. For example, both sodium and beryllium are too reactive to be electroplated from aqueous solution, but beryllium can be electroplated from liquid ammonia and sodium from solutions in pyridine. 0 Unfortunately, the thermodynamic data necessary to construct complete tables of standard potential values are lacking for most solvents other than water. Jolly 1 has compiled such a table for liquid ammonia. The hydrogen electrode is used as the reference point to establish the scale as in water ... 

No other experimental studies associated with thermodynamic data of beryllium selenites have been found. 

The stability constant and enthalpy of reaction derived for each beryllium species can be used together with the Gibbs energy and enthalpy of formation given for Be in the literature (Bard, Parsons and Jordan, 1985 Renders and Anderson, 1987) and that for H2O listed in Chapter 5 to derive the Gibbs energy and enthalpy of formation values for each species. These can then be coupled with literature entropy data (Grenthe etal., 1992) to derive the respective entropy values. These thermodynamic data are Usted in Table 7.1. 

Table 7.1 Thermodynamic data for beryllium(ll) species at 25 °C and comparison with data available in the literature.

Soboleva etal. (1977) also provided data on the solubility of bromellite (BeO(s)). They studied the solubility of this phase over the temperature range of 150-250 °C but provided thermodynamic data over the larger range of 25-300 C. From the solubility study, they provided data for the stability constants of the beryllium hydrolysis species, BeOH", Be(OH)2(aq) and Be(OH)3 , as well as that of the... 

Table 7.5 Literature thermodynamic data for beryllium species at 25 C.

Konings RJM, Benes O (2010) Thermodynamic properties of the f-elements tmd their compounds the lanthanide and actinide metals. J Phys Chem Refer Data 39 043102 Kleykamp H (2000) Thermal properties of beryllium. Thermochim Acta 345 179—184 Digonskii VV, Digonskii SV (1992) Laws of the diamond formation. Nedra, St. Peterbuig (in... 

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