Difluoroborane ((BF2)2) B2F4(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 43.322 255.051 376.204 -12.115 -1429.664 -1421.034 742.272 200 61.947 290.817 325.053 -6.847 -1430.920 -1411.855 368.739 250 70.075 305.535 319.702 -3.542 -1431.362 -1407.037 293.984 298.15 76.891 318.473 318.473 0. -1431.765 -1402.315 245.680 300 77.135 318.950 318.475 0.142 -1431.780 -1402.133 244.133 350 83.308 331.314 319.437 4.157 -1432.198 -1397.158 208.514 400 88.716 342.799 321.648 8.461 -1432.626 -1392.124 181.793 450 93.438 353.528 324.601 13.017 -1433.059 -1387.035 161.003 500 97.541 363.590 328.002 17.794 -1433.485 -1381.898 144.366 600 104.163 381.988 335.496 27.895 -1434.294 -1371.504 119.400 700 109.105 398.435 343.334 38.571 -1435.032 -1360.979 101.558 800 112.815 413.257 351.163 49.675 -1435.712 -1350.354 88.169 900 115.634 426.715 358.822 61.104 -1436.355 -1339.645 77.751 1000 117.806 439.016 366.235 72.781 -1436.982 -1328.866 69.413 1100 119.505 450.327 373.372 84.650 -1437.613 -1318.024 62.588 1200 120.855 460.785 380.227 96.670 -1438.262 -1307.123 56.898 1300 121.940 470.503 386.802 108.812 -1438.942 -1296.168 52.081 1400 122.824 479.573 393.108 121.051 -1439.663 -1285.159 47.950 1500 123.553 488.073 399.158 133.371 -1440.433 -1274.096 44.368 1600 124.161 496.067 404.968 145.758 -1441.256 -1262.980 41.232 1700 124.671 503.610 410.551 158.200 -1442.137 -1251.811 38.463 1800 125.104 510.748 415.921 170.690 -1443.077 -1240.589 36.001 1900 125.475 517.522 421.091 183.219 -1444.074 -1229.313 33.796 2000 125.794 523.967 426.075 195.783 -1445.127 -1217.982 31.810 2100 126.070 530.111 430.884 208.376 -1446.233 -1206.598 30.012 2200 126.311 535.982 435.529 220.996 -1447.387 -1195.160 28.377 2300 126.523 541.601 440.019 233.638 -1448.583 -1183.668 26.882 2400 126.710 546.990 444.365 246.300 -1550.335 -1169.986 25.464 2500 126.875 552.166 448.574 258.979 -1551.754 -1154.109 24.114 2600 127.023 557.145 452.655 271.674 -1553.134 -1138.176 22.866 2700 127.154 561.941 456.614 284.383 -1554.468 -1122.191 21.710 2800 127.273 566.568 460.459 297.104 -1555.751 -1106.157 20.636 2900 127.379 571.036 464.195 309.837 -1556.980 -1090.078 19.634 3000 127.475 575.356 467.829 322.580 -1558.150 -1073.958 18.699 3100 127.563 579.537 471.366 335.332 -1559.257 -1057.800 17.824 3200 127.642 583.588 474.810 348.092 -1560.299 -1041.607 17.002 3300 127.715 587.517 478.166 360.860 -1561.272 -1025.383 16.230 3400 127.781 591.331 481.438 373.635 -1562.176 -1009.130 15.503 3500 127.842 595.036 484.631 386.416 -1563.008 -992.851 14.817 3600 127.898 598.638 487.748 399.203 -1563.768 -976.550 14.169 3700 127.949 602.143 490.793 411.996 -1564.455 -960.229 13.556 3800 127.997 605.556 493.768 424.793 -1565.069 -943.890 12.975 3900 128.040 608.881 496.678 437.595 -1565.610 -927.536 12.423 4000 128.081 612.124 499.523 450.401 -1566.079 -911.169 11.899 4100 128.119 615.287 502.308 463.211 -1566.475 -894.791 11.400 4200 128.154 618.374 505.035 476.025 -2526.500 -864.356 10.750 4300 128.187 621.390 507.706 488.842 -2524.581 -824.804 10.019 4400 128.218 624.338 510.324 501.662 -2522.597 -785.297 9.323 4500 128.246 627.219 512.889 514.485 -2520.551 -745.836 8.657 4600 128.273 630.038 515.406 527.311 -2518.443 -706.421 8.022 4700 128.298 632.797 517.874 540.140 -2516.276 -667.052 7.413 4800 128.322 635.499 520.296 552.971 -2514.052 -627.730 6.831 4900 128.344 638.145 522.675 565.804 -2511.773 -588.456 6.273 5000 128.365 640.738 525.010 578.639 -2509.442 -549.228 5.738 5100 128.384 643.280 527.304 591.477 -2507.060 -510.047 5.224 5200 128.403 645.773 529.559 604.316 -2504.631 -470.913 4.730 5300 128.420 648.219 531.774 617.157 -2502.156 -431.827 4.256 5400 128.437 650.620 533.953 630.000 -2499.638 -392.788 3.799 5500 128.452 652.977 536.096 642.845 -2497.079 -353.796 3.360 5600 128.467 655.291 538.204 655.691 -2494.481 -314.850 2.937 5700 128.481 657.565 540.278 668.538 -2491.847 -275.952 2.529 5800 128.495 659.800 542.319 681.387 -2489.178 -237.100 2.135 5900 128.507 661.997 544.329 694.237 -2486.478 -198.294 1.756 6000 128.519 664.157 546.308 707.088 -2483.748 -159.535 1.389