Tantalum Oxide (Ta2O5) O5Ta2(l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 135.034 183.050 183.050 0.000 -1957.171 -1834.107 321.328 300 135.342 183.886 183.052 0.250 -1957.151 -1833.343 319.213 400 147.515 224.617 188.524 14.437 -1955.509 -1792.296 234.050 500 156.862 258.572 199.230 29.671 -1953.141 -1751.754 183.005 600 164.431 287.866 211.616 45.750 -1950.282 -1711.739 149.020 700 170.431 313.682 224.389 62.505 -1947.071 -1672.231 124.783 800 175.197 336.761 237.019 79.794 -1943.592 -1633.204 106.637 900 179.038 357.619 249.279 97.507 -1939.905 -1594.624 92.550 1000 182.753 376.690 261.080 115.610 -1936.016 -1556.467 81.301 1100 184.824 394.203 272.397 133.987 -1932.032 -1518.704 72.117 1200 187.071 410.384 283.230 152.584 -1928.002 -1481.306 64.480 1300 189.021 425.436 293.597 171.391 -1923.920 -1444.247 58.031 1400 190.740 439.508 303.522 190.381 -1919.785 -1407.503 52.515 1400.000 190.740 439.508 303.522 190.381 GLASS <--> LIQUID 1400.000 242.672 439.508 303.522 190.381 TRANSITION 1500 242.672 456.251 313.152 214.648 -1910.474 -1371.238 47.751 1600 242.672 471.913 322.591 238.915 -1901.249 -1335.590 43.603 1700 242.672 486.624 331.811 263.182 -1892.121 -1300.516 39.960 1800 242.672 500.495 340.801 287.450 -1883.122 -1265.977 36.738 1900 242.672 513.616 349.554 311.717 -1874.282 -1231.933 33.868 2000 242.672 526.063 358.071 335.984 -1865.606 -1198.350 31.298 2058.000 242.672 533.001 362.904 350.059 CRYSTAL <--> LIQUID 2100 242.672 537.903 366.355 360.251 1857.093 1165.197 28.983 2200 242.672 549.192 374.411 384.518 -1848.743 -1132.445 26.888 2300 242.672 559.980 382.247 408.786 -1840.560 -1100.071 24.983 2400 242.672 570.308 389.869 433.053 -1832.552 -1068.049 23.245 2500 242.672 580.214 397.286 457.320 -1824.733 -1036.356 21.653 2600 242.672 589.732 404.506 481.587 -1817.118 -1004.971 20.190 2700 242.672 598.890 411.537 505.854 -1809.728 -973.875 18.841 2800 242.672 607.716 418.386 530.122 -1802.587 -943.049 17.593 2900 242.672 616.231 425.063 554.389 -1795.721 -912.475 16.435 3000 242.672 624.458 431.573 578.656 -1789.164 -882.130 15.359 3100 242.672 632.415 437.924 602.923 -1782.950 -851.997 14.356 3200 242.672 640.120 444.123 627.190 -1777.119 -822.063 13.419 3300 242.672 647.587 450.176 651.458 -1844.626 -791.361 12.526 3400 242.672 654.832 456.089 675.725 -1838.846 -759.529 11.669 3500 242.672 661.866 461.869 699.992 -1833.107 -727.869 10.863 3600 242.672 668.703 467.519 724.259 -1827.406 -696.371 10.104 3700 242.672 675.352 473.047 748.526 -1821.742 -665.033 9.389 3800 242.672 681.823 478.456 772.794 -1816.114 -633.844 8.713 3900 242.672 688.127 483.752 797.061 -1810.520 -602.804 8.074 4000 242.672 694.271 488.939 821.328 -1804.960 -571.909 7.468 4100 242.672 700.263 494.020 845.595 -1799.432 -541.151 6.894 4200 242.672 706.111 499.001 869.862 -1793.936 -510.528 6.349 4300 242.672 711.821 503.884 894.130 -1788.471 -480.034 5.831 4400 242.672 717.400 508.673 918.397 -1783.036 -449.670 5.338 4500 242.672 722.853 513.372 942.664 -1777.632 -419.428 4.869 4600 242.672 728.187 517.984 966.931 -1772.258 -389.306 4.421 4700 242.672 733.406 522.513 991.198 -1766.916 -359.298 3.993 4800 242.672 738.515 526.960 1015.466 -1761.604 -329.405 3.585 4900 242.672 743.519 531.328 1039.733 -1756.324 -299.621 3.194 5000 242.672 748.421 535.621 1064.000 -1751.077 -269.945 2.820