Niobium, Ion (Nb-) Nb1-(g)
 
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 -8.654 643.763    
100 30.251 153.166 212.710 -5.954      
200 30.317 174.205 188.796 -2.918      
250 29.768 180.919 186.576 -1.414      
 
298.15 28.948 186.095 186.095 0. 640.978 602.621 -105.577
 
300 28.913 186.274 186.095 0.054 640.948 602.383 -104.884
350 27.956 190.659 186.444 1.475 640.085 596.023 -88.952
400 27.029 194.331 187.207 2.850 639.158 589.790 -77.019
450 26.196 197.465 188.177 4.180 638.172 583.678 -67.752
500 25.474 200.187 189.245 5.471 637.135 577.678 -60.350
 
600 24.342 204.725 191.461 7.959 634.932 565.991 -49.274
700 23.538 208.414 193.627 10.350 632.589 554.685 -41.391
800 22.962 211.517 195.675 12.674 630.136 543.722 -35.501
900 22.541 214.196 197.587 14.948 627.593 533.072 -30.939
1000 22.227 216.554 199.368 17.186 624.972 522.709 -27.304
 
1100 21.988 218.661 201.028 19.396 622.284 512.613 -24.342
1200 21.803 220.566 202.578 21.585 619.534 502.764 -21.885
1300 21.656 222.305 204.030 23.758 616.729 493.146 -19.815
1400 21.539 223.905 205.393 25.917 613.872 483.746 -18.049
1500 21.443 225.388 206.677 28.066 610.961 474.553 -16.525
 
1600 21.364 226.769 207.890 30.206 607.990 465.556 -15.199
1700 21.299 228.062 209.039 32.339 604.953 456.746 -14.034
1800 21.243 229.278 210.130 34.466 601.846 448.117 -13.004
1900 21.197 230.425 211.168 36.588 598.663 439.663 -12.087
2000 21.157 231.512 212.159 38.706 595.399 431.379 -11.266
 
2100 21.122 232.543 213.105 40.820 592.049 423.260 -10.528
2200 21.092 233.525 214.011 42.931 588.609 415.303 -9.861
2300 21.066 234.462 214.880 45.038 585.070 407.504 -9.255
2400 21.043 235.358 215.715 47.144 581.423 399.862 -8.703
2500 21.023 236.217 216.518 49.247 577.653 392.374 -8.198
 
2600 21.005 237.041 217.291 51.349 573.736 385.039 -7.736
2700 20.989 237.833 218.038 53.448 569.634 377.859 -7.310
2800 20.975 238.596 218.758 55.546 538.934 371.319 -6.927
2900 20.962 239.332 219.455 57.643 535.605 365.391 -6.581
3000 20.950 240.043 220.130 59.739 532.275 359.579 -6.261
 
3100 20.940 240.729 220.783 61.833 528.944 353.877 -5.963
3200 20.930 241.394 221.417 63.927 525.611 348.283 -5.685
3300 20.922 242.038 222.032 66.019 522.278 342.793 -5.426
3400 20.914 242.662 222.630 68.111 518.944 337.404 -5.184
3500 20.906 243.268 223.211 70.202 515.609 332.113 -4.957
 
3600 20.900 243.857 223.776 72.293 512.274 326.918 -4.743
3700 20.894 244.430 224.327 74.382 508.938 321.815 -4.543
3800 20.888 244.987 224.863 76.471 505.601 316.802 -4.355
3900 20.883 245.530 225.386 78.560 502.264 311.877 -4.177
4000 20.878 246.058 225.896 80.648 498.926 307.038 -4.010
 
4100 20.874 246.574 226.394 82.735 495.588 302.282 -3.851
4200 20.869 247.077 226.881 84.823 492.249 297.608 -3.701
4300 20.866 247.568 227.356 86.909 488.910 293.013 -3.559
4400 20.862 248.047 227.821 88.996 485.570 288.496 -3.425
4500 20.859 248.516 228.276 91.082 482.231 284.054 -3.297
 
4600 20.855 248.974 228.721 93.167 478.891 279.687 -3.176
4700 20.853 249.423 229.156 95.253 475.550 275.393 -3.061
4800 20.850 249.862 229.583 97.338 472.210 271.169 -2.951
4900 20.847 250.292 230.001 99.423 468.869 267.016 -2.846
5000 20.845 250.713 230.412 101.507 465.527 262.930 -2.747
 
5100 20.842 251.126 230.814 103.592 462.186 258.911 -2.652
5200 20.840 251.530 231.208 105.676 -231.828 264.268 -2.655
5300 20.838 251.927 231.595 107.760 -235.501 273.843 -2.699
5400 20.836 252.317 231.975 109.844 -239.149 283.483 -2.742
5500 20.834 252.699 232.349 111.927 -242.869 293.196 -2.785
 
5600 20.833 253.075 232.716 114.010 -246.618 302.977 -2.826
5700 20.831 253.443 233.076 116.094 -250.396 312.824 -2.867
5800 20.830 253.806 233.430 118.177 -254.202 322.738 -2.907
5900 20.828 254.162 233.779 120.260 -258.037 332.718 -2.946
6000 20.827 254.512 234.121 122.342 -261.902 342.764 -2.984
 
PREVIOUS: CURRENT: March 1984 (1 bar)
 
Niobium, Ion (Nb-) Nb1-(g)

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