Sodium Borate (Na2B6O10) B6Na2O10(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 243.509 232.212 232.212 0. -4580.476 -4302.768 753.827 300 244.346 233.721 232.217 0.451 -4580.527 -4301.045 748.878 400 283.173 309.380 242.270 26.844 -4588.408 -4207.071 549.387 500 319.992 376.581 262.525 57.028 -4590.107 -4111.507 429.526 600 353.757 437.950 286.718 90.739 -4590.114 -4015.757 349.603 700 384.677 494.845 312.434 127.687 -4588.273 -3920.150 292.525 800 412.375 548.063 338.597 167.572 -4584.587 -3824.935 249.743 900 436.182 598.047 364.677 210.033 -4579.219 -3730.284 216.500 1000 456.056 645.071 390.389 254.682 -4572.428 -3636.311 189.941 1100 471.453 689.291 415.572 301.090 -4564.561 -3543.071 168.246 1200 482.917 730.824 440.131 348.831 -4749.519 -3445.703 149.988 1300 491.746 769.840 464.008 397.582 -4738.691 -3337.488 134.102 1400 498.482 806.540 487.177 447.108 -4727.528 -3230.120 120.517 1500 503.461 841.109 509.632 497.217 -4716.188 -3123.559 108.772 1600 507.017 873.720 531.378 547.747 -4704.808 -3017.754 98.520 1700 509.737 904.543 552.431 598.590 -4693.479 -2912.661 89.495 1800 511.829 933.739 572.811 649.672 -4682.263 -2808.233 81.493 1900 513.544 961.459 592.542 700.941 -4671.198 -2704.422 74.350 2000 515.134 987.841 611.653 752.376 -4660.301 -2601.189 67.936