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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Cleaver, B. Smedley, S. I. |
| Copyright Year | 1971 |
| Abstract | The electrical conductivities of molten HgCl2, HgBr2 and HgI2 have been measured over the pressure range 1–1000 bar at temperatures between 260°C and 370°C. In each case the conductivity increased with pressure; at 300°C, the specific conductance “activation volume”ΔVκ=–RT(∂ ln x/∂P)T, was –50 cm3 mol–1 for HgCl2, –65 cm3 mol–1 for HgBr2 and –102 cm3 mol–1 for HgI2. These increases in conductivity are attributed to the displacement of ionization equilibria of the type 2HgX2⇌HgX++HgX–3(X = halogen). The Born equation was used to estimate the volume changes associated with ionization, with results in reasonable accord with the experimental values. The pressure required to cause complete ionization is estimated to be in the range 5–10 kbar. For molten HgI2, d.c. electrolysis experiments showed that the increase in conductivity with pressure was not caused by the onset of electronic conductivity. Although the conductivity at constant pressure decreases with temperature for HgI2, and passes through a maximum with rising temperature for HgBr2 and HgCl2, the conductivity at constant density increases with temperature for all three compounds. |
| Starting Page | 1115 |
| Ending Page | 1127 |
| Page Count | 13 |
| File Format | |
| ISSN | 00147672 |
| Volume Number | 67 |
| Journal | Transactions of the Faraday Society |
| DOI | 10.1039/TF9716701115 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Electrical resistivity and conductivity AEC Regent III RT Mercury(II) bromide Electrolysis Ionization Halogen Born equation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Physical and Theoretical Chemistry Engineering |
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