Potassium Tetrafluoroborate (KBF4) B1F4K1(cr,l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 114.483 133.888 133.888 0. -1886.984 -1784.958 312.717 300 114.780 134.597 133.890 0.212 -1886.963 -1784.325 310.679 400 130.817 169.809 138.583 12.490 -1887.964 -1749.854 228.507 500 146.963 200.734 147.976 26.379 -1885.646 -1715.571 179.224 556.000 156.027 216.808 154.105 34.863 I <--> II 556.000 140.146 242.093 154.105 48.921 TRANSITION 600 142.097 252.840 160.956 55.130 -1868.862 -1682.950 146.514 700 146.519 275.076 175.703 69.561 -1866.685 -1652.134 123.284 800 150.938 294.930 189.387 84.434 -1864.291 -1621.644 105.882 843.000 152.838 302.881 194.975 90.965 II <--> LIQUID 843.000 167.117 323.826 194.975 108.622 TRANSITION 900 167.117 334.760 203.485 118.147 -1843.251 -1592.688 92.437 1000 167.117 352.368 217.509 134.859 -1839.394 -1565.057 81.750 1100 167.117 368.296 230.504 151.571 -1914.671 -1533.192 72.805 1200 167.117 382.837 242.601 168.283 -1910.118 -1498.714 65.237 1300 167.117 396.213 253.910 184.994 -1905.665 -1464.612 58.849 1400 167.117 408.598 264.522 201.706 -1901.304 -1430.849 53.386 1500 167.117 420.128 274.516 218.418 -1897.027 -1397.394 48.662