Tantalum Oxide (Ta2O5) O5Ta2(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0.000 0.000 INFINITE -23.041 -2035.947 -2035.947 INFINITE 100 58.082 37.108 243.530 -20.642 -2042.799 -1999.955 1044.669 200 108.311 94.161 154.766 -12.121 -2046.060 -1955.515 510.728 298.15 135.034 143.114 143.114 0.000 -2045.976 -1911.004 334.800 300 135.342 143.950 143.116 0.250 -2045.956 -1910.167 332.590 400 147.515 184.681 148.588 14.437 -2044.314 -1865.126 243.561 500 156.862 218.636 159.293 29.671 -2041.946 -1820.591 190.196 600 164.431 247.930 171.680 45.750 -2039.087 -1776.582 154.665 700 170.431 273.746 184.453 62.505 -2035.876 -1733.081 129.324 800 175.197 296.825 197.083 79.794 -2032.397 -1690.059 110.350 900 179.038 317.683 209.342 97.507 -2028.710 -1647.487 95.618 1000 182.753 336.753 221.144 115.610 -2024.820 -1605.335 83.854 1100 184.824 354.267 232.461 133.987 -2020.837 -1563.579 74.248 1200 187.071 370.448 243.294 152.584 -2016.807 -1522.187 66.259 1300 189.021 385.500 253.661 171.391 -2012.725 -1481.134 59.513 1400 190.740 399.572 263.586 190.380 -2008.590 -1440.398 53.742 1500 192.280 412.785 273.096 209.533 -2004.394 -1399.959 48.751 1600 193.673 425.239 282.220 228.831 -2000.138 -1359.802 44.393 1700 194.953 437.020 290.982 248.263 -1995.845 -1319.912 40.556 1800 196.138 448.197 299.409 267.819 -1991.558 -1280.276 37.153 1900 197.246 458.831 307.522 287.488 -1987.315 -1240.876 34.114 2000 198.288 468.975 315.343 307.265 -1983.130 -1201.698 31.385 2058.000 198.870 474.652 319.753 318.783 CRYSTAL <--> LIQUID 2100 199.278 478.674 322.891 327.144 1979.005 1162.728 28.921 2200 200.225 487.967 330.185 347.120 -1974.946 -1123.952 26.686 2300 201.133 496.887 337.240 367.188 -1970.962 -1085.361 24.649 2400 202.012 505.466 344.072 387.345 -1967.065 -1046.941 22.786 2500 202.859 513.730 350.694 407.589 -1963.269 -1008.681 21.075 2600 203.685 521.702 357.119 427.916 -1959.594 -970.570 19.499 2700 204.491 529.404 363.358 448.325 -1956.062 -932.597 18.042 2800 205.275 536.855 369.422 468.814 -1952.699 -894.753 16.692