fH°fG°| Niobium Oxide (Nb2O5) | Nb2O5(cr) | |||||||||||||
| Enthalpy Reference Temperature = Tr = 298.15 K | Standard State Pressure = p° = 0.1 MPa | |||||||||||||
| J·K-1 mol-1 | kJ·mol-1 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T/K | Cp° | S° | -[G°-H°(Tr)]/T | H-H°(Tr) | fH° |
fG° |
log Kf | |||||||
| 0 | 0. | 0. | INFINITE | -22.287 | -1889.634 | -1889.634 | INFINITE | |||||||
| 100 | 54.455 | 34.317 | 235.233 | -20.092 | -1896.262 | -1853.855 | 968.355 | |||||||
| 200 | 105.922 | 89.529 | 148.666 | -11.827 | -1899.472 | -1809.884 | 472.693 | |||||||
| 298.15 | 131.988 | 137.298 | 137.298 | 0. | -1899.536 | -1765.817 | 309.364 | |||||||
| 300 | 132.320 | 138.115 | 137.300 | 0.244 | -1899.519 | -1764.987 | 307.312 | |||||||
| 400 | 144.992 | 178.096 | 142.666 | 14.172 | -1898.035 | -1720.341 | 224.653 | |||||||
| 500 | 153.841 | 211.441 | 153.178 | 29.131 | -1895.852 | -1676.159 | 175.107 | |||||||
| 600 | 160.737 | 240.126 | 165.334 | 44.875 | -1893.233 | -1632.460 | 142.118 | |||||||
| 700 | 166.013 | 265.318 | 177.855 | 61.225 | -1890.331 | -1589.225 | 118.589 | |||||||
| 800 | 170.038 | 287.760 | 190.216 | 78.035 | -1887.259 | -1546.418 | 100.971 | |||||||
| 900 | 173.117 | 307.972 | 202.195 | 95.199 | -1884.086 | -1504.003 | 87.290 | |||||||
| 1000 | 175.502 | 326.340 | 213.706 | 112.634 | -1880.865 | -1461.944 | 76.364 | |||||||
| 1100 | 177.360 | 343.157 | 224.720 | 130.280 | -1877.632 | -1420.207 | 67.440 | |||||||
| 1200 | 178.828 | 358.654 | 235.244 | 148.092 | -1874.413 | -1378.766 | 60.016 | |||||||
| 1300 | 179.991 | 373.016 | 245.296 | 166.035 | -1871.225 | -1337.591 | 53.745 | |||||||
| 1400 | 180.920 | 386.390 | 254.902 | 184.082 | -1868.087 | -1296.661 | 48.379 | |||||||
| 1500 | 181.665 | 398.898 | 264.090 | 202.213 | -1865.024 | -1255.953 | 43.736 | |||||||
| 1600 | 182.263 | 410.642 | 272.886 | 220.410 | -1862.060 | -1215.445 | 39.680 | |||||||
| 1700 | 182.745 | 421.707 | 281.318 | 238.661 | -1859.220 | -1175.119 | 36.107 | |||||||
| 1785.000 | 183.075 | 430.631 | 288.217 | 254.209 | CRYSTAL <--> LIQUID | |||||||||
| 1800 | 183.129 | 432.163 | 289.410 | 256.956 | 1856.527 1134.957 32.936 | |||||||||
| 1900 | 183.435 | 442.073 | 297.187 | 275.284 | -1854.000 | -1094.939 | 30.102 | |||||||
| 2000 | 183.678 | 451.489 | 304.668 | 293.640 | -1851.656 | -1055.050 | 27.555 | |||||||
| 2100 | 183.862 | 460.455 | 311.875 | 312.018 | -1849.512 | -1015.273 | 25.254 | |||||||
| 2200 | 184.004 | 469.012 | 318.825 | 330.411 | -1847.584 | -975.592 | 23.164 | |||||||
| 2300 | 184.109 | 477.193 | 325.534 | 348.817 | -1845.891 | -935.996 | 21.257 | |||||||
| PREVIOUS: | CURRENT: December 1972 | |||||||||||||
| Niobium Oxide (Nb2O5) | Nb2O5(cr) | |||||||||||||
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