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Species |
Go (298 K) |
So(298 K) |
A |
B x 103 |
C x 10-5 |
|
|
(J·mol-1) |
(J·mol-1) |
|||
| O2 | 0 | 205 | 29.96 | 4.184 | -1.674 |
| H2 | 0 | 131 | 27.28 | 3.263 | 0.502 |
| H2O | -237000 | 69.9 | 75.27 | 0 | 0 |
| Fe | 0 | 27.1 | 12.72 | 31.71 | -2.51 |
| Fe3O4 | -1,020,000 | 146 | 91.55 | 201.67 | 0 |
| Fe2O3 | -742,000 | 87.3 | 98.28 | 77.82 | -14.85 |
| Fe(OH)2 | -493,000 | 92.4 | 96.3 | 0 | 0 |
| Fe(OH)3 | -714,000 | 96.1 | 105 | 0 | 0 |
| Species | Go (298 K) | So (298 K) | Šo (298 K) | a | b |
| (J·mol-1) | (J·mol-1) | (J·mol-1) | |||
| H+ | 0 | 0 | -20.9 | 0.065 | -0.005 |
| Fe(OH)2(sln) | -449,000 | 38 | 38 | 0.13 | -0.0017 |
| Fe(OH)3(sln) | -661,000 | 75.2 | 75.2 | 0.13 | -0.0017 |
| FeOH+ | -274,000 | -29.3 | -50.2 | 0.13 | -0.0017 |
| Fe(OH)2+ | -459,000 | -29.3 | -50.2 | 0.13 | -0.0017 |
| Fe2+ | -92,200 | -107 | -149 | 0.13 | -0.0017 |
| FeOH2+ | -242,000 | -105 | -147 | 0.13 | -0.0017 |
| Fe3+ | -17,800 | -279 | -342 | 0.13 | -0.0017 |
| Fe(OH)3- | -621,000 | 41.8 | 62.7 | -0.37 | 0.0055 |
| Fe(OH)4- | -843,000 | 25.1 | 46 | -0.37 | 0.0055 |
| FeO42- | -467,000 | 37.6 | 79.5 | -0.37 | 0.0055 |
See also: Equilibrium reactions of iron in water, Iron corrosion products, Iron species and their thermodynamic data, Pourbaix diagram of iron, Rust chemistry, Rust converters, Steel corrosion
