Niobium Oxide (Nb2O5) Nb2O5(cr,l)
 
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
1785.000 242.254 489.043 288.217 358.475 TRANSITION
 
1800 242.254 491.070 289.899 362.108 -1751.374 -1135.837 32.961
1900 242.254 504.168 300.835 386.334 -1742.951 -1101.871 30.293
2000 242.254 516.594 311.315 410.559 -1734.738 -1068.343 27.902
 
2100 242.254 528.414 321.374 434.784 -1726.746 -1035.221 25.750
2200 242.254 539.684 331.043 459.010 -1718.985 -1002.472 23.802
2300 242.254 550.452 340.350 483.235 -1711.473 -970.074 22.031
2400 242.254 560.762 349.321 507.461 -1704.227 -937.996 20.415
2500 242.254 570.652 357.977 531.686 -1697.280 -906.214 18.934
 
2600 242.254 580.153 366.341 555.911 -1690.674 -874.703 17.573
2700 242.254 589.296 374.430 580.137 -1684.489 -843.437 16.317
2800 242.254 598.106 382.262 604.362 -1731.546 -811.424 15.137
2900 242.254 606.607 389.853 628.587 -1723.909 -778.699 14.026
3000 242.254 614.820 397.216 652.813 -1716.320 -746.234 12.993
 
3100 242.254 622.763 404.364 677.038 -1708.778 -714.021 12.031
3200 242.254 630.455 411.310 701.263 -1701.282 -682.053 11.133
3300 242.254 637.909 418.064 725.489 -1693.829 -650.319 10.294
3400 242.254 645.141 424.637 749.714 -1686.417 -618.807 9.507
3500 242.254 652.163 431.038 773.940 -1679.046 -587.515 8.768
 
3600 242.254 658.988 437.275 798.165 -1671.713 -556.432 8.074
3700 242.254 665.625 443.358 822.390 -1664.417 -525.554 7.419
3800 242.254 672.086 449.292 846.616 -1657.157 -494.869 6.802
3900 242.254 678.379 455.086 870.841 -1649.932 -464.376 6.220
4000 242.254 684.512 460.745 895.066 -1642.740 -434.070 5.668
 
4100 242.254 690.494 466.276 919.292 -1635.580 -403.942 5.146
4200 242.254 696.331 471.685 943.517 -1628.452 -373.988 4.651
4300 242.254 702.032 476.975 967.742 -1621.355 -344.203 4.181
4400 242.254 707.601 482.154 991.968 -1614.289 -314.585 3.735
4500 242.254 713.045 487.225 1016.193 -1607.253 -285.126 3.310
 
4600 242.254 718.370 492.192 1040.418 -1600.248 -255.824 2.905
4700 242.254 723.580 497.060 1064.644 -1593.273 -226.671 2.519
4800 242.254 728.680 501.832 1088.869 -1586.330 -197.668 2.151
4900 242.254 733.675 506.513 1113.095 -1579.418 -168.808 1.800
5000 242.254 738.569 511.105 1137.320 -1572.540 -140.089 1.464
 
PREVIOUS: CURRENT: December 1972
 
Niobium Oxide (Nb2O5) Nb2O5(cr,l)

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