Potassium Borate (K2B6O10) B6K2O10(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 261.918 251.040 251.040 0. -4633.529 -4353.554 762.725 300 262.337 252.661 251.045 0.485 -4633.551 -4351.817 757.719 400 285.767 331.362 261.617 27.898 -4640.126 -4256.761 555.876 500 308.277 397.560 282.348 57.606 -4642.314 -4160.664 434.662 600 330.118 455.703 306.487 89.530 -4644.154 -4064.153 353.816 700 351.456 508.194 331.610 123.608 -4645.271 -3967.385 296.050 800 372.794 556.524 356.742 159.826 -4645.388 -3870.524 252.719 900 393.463 601.639 381.473 198.150 -4644.347 -3773.716 219.021 1000 412.835 644.176 405.636 238.539 -4642.067 -3677.091 192.072 1100 423.295 684.043 429.155 280.376 -4796.992 -3571.514 169.597 1200 430.073 721.173 451.961 323.055 -4791.748 -3460.337 150.625 1300 435.680 755.823 474.018 366.347 -4786.378 -3349.604 134.589 1400 440.659 788.294 495.318 410.167 -4780.923 -3239.287 120.859 1500 445.387 818.859 515.879 454.471 -4775.390 -3129.364 108.974 1600 449.864 847.747 535.726 499.234 -4769.782 -3019.811 98.587 1700 454.299 875.154 554.893 544.443 -4764.094 -2910.611 89.432 1800 458.622 901.244 573.416 590.090 -4758.324 -2801.750 81.305 1900 462.834 926.153 591.330 636.164 -4752.475 -2693.210 74.042 2000 466.934 949.998 608.672 682.653 -4746.552 -2584.980 67.513