Niobium Oxide (Nb2O5) Nb2O5(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              
100              
200              
 
298.15 131.988 171.488 171.488 0. -1830.873 -1707.347 299.120
 
300 132.320 172.306 171.491 0.244 -1830.856 -1706.581 297.142
400 144.992 212.286 176.857 14.172 -1829.371 -1665.354 217.473
500 153.841 245.631 187.368 29.131 -1827.189 -1624.591 169.720
 
600 160.737 274.316 199.524 44.875 -1824.569 -1584.311 137.927
700 166.013 299.509 212.045 61.225 -1821.668 -1544.495 115.252
800 170.038 321.950 224.406 78.035 -1818.595 -1505.107 98.273
900 173.117 342.162 236.386 95.199 -1815.423 -1466.111 85.091
1000 175.502 360.530 247.896 112.634 -1812.202 -1427.470 74.563
 
1100 177.360 377.347 258.910 130.280 -1808.969 -1389.153 65.965
1200 178.828 392.845 269.434 148.093 -1805.749 -1351.131 58.813
 
1200.000 178.828 392.845 269.434 148.093 GLASS <--> LIQUID
1200.000 242.254 392.845 269.434 148.093 TRANSITION
 
1300 242.254 412.236 279.683 172.318 -1796.279 -1313.631 52.782
1400 242.254 430.189 289.800 196.544 -1786.963 -1276.855 47.640
1500 242.254 446.902 299.723 220.769 -1777.804 -1240.739 43.206
 
1600 242.254 462.537 309.416 244.994 -1768.813 -1205.229 39.347
1700 242.254 477.224 318.859 269.220 -1759.998 -1170.276 35.958
 
1785.000 242.254 489.043 326.684 289.811 CRYSTAL <--> LIQUID
 
1800 242.254 491.070 328.045 293.445 1751.374 1135.837 32.961
1900 242.254 504.168 336.973 317.670 -1742.951 -1101.871 30.293
2000 242.254 516.594 345.646 341.896 -1734.738 -1068.343 27.902
 
2100 242.254 528.414 354.071 366.121 -1726.746 -1035.221 25.750
2200 242.254 539.684 362.253 390.347 -1718.985 -1002.472 23.802
2300 242.254 550.452 370.204 414.572 -1711.473 -970.074 22.031
2400 242.254 560.762 377.930 438.797 -1704.227 -937.996 20.415
2500 242.254 570.652 385.443 463.023 -1697.280 -906.214 18.934
 
2600 242.254 580.153 392.750 487.248 -1690.674 -874.703 17.573
2700 242.254 589.296 399.861 511.473 -1684.489 -843.437 16.317
2800 242.254 598.106 406.785 535.699 -1731.546 -811.424 15.137
2900 242.254 606.607 413.530 559.924 -1723.909 -778.699 14.026
3000 242.254 614.820 420.103 584.149 -1716.320 -746.234 12.993
 
3100 242.254 622.763 426.513 608.375 -1708.778 -714.021 12.031
3200 242.254 630.455 432.767 632.600 -1701.282 -682.053 11.133
3300 242.254 637.909 438.871 656.826 -1693.829 -650.319 10.294
3400 242.254 645.141 444.832 681.051 -1686.417 -618.807 9.507
3500 242.254 652.163 450.656 705.276 -1679.046 -587.515 8.768
 
3600 242.254 658.988 456.349 729.502 -1671.713 -556.432 8.074
3700 242.254 665.625 461.915 753.727 -1664.417 -525.554 7.419
3800 242.254 672.086 467.362 777.952 -1657.157 -494.869 6.802
3900 242.254 678.379 472.692 802.178 -1649.932 -464.376 6.220
4000 242.254 684.512 477.911 826.403 -1642.740 -434.070 5.668
 
4100 242.254 690.494 483.023 850.628 -1635.580 -403.942 5.146
4200 242.254 696.331 488.033 874.854 -1628.452 -373.988 4.651
4300 242.254 702.032 492.944 899.079 -1621.355 -344.203 4.181
4400 242.254 707.601 497.759 923.304 -1614.289 -314.585 3.735
4500 242.254 713.045 502.483 947.530 -1607.253 -285.126 3.310
 
4600 242.254 718.370 507.119 971.755 -1600.248 -255.824 2.905
4700 242.254 723.580 511.669 995.981 -1593.273 -226.671 2.519
4800 242.254 728.680 516.137 1020.206 -1586.330 -197.668 2.151
4900 242.254 733.675 520.526 1044.431 -1579.418 -168.808 1.800
5000 242.254 738.569 524.838 1068.657 -1572.540 -140.089 1.464
 
PREVIOUS: CURRENT: December 1972
 
Niobium Oxide (Nb2O5) Nb2O5(l)

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