Lead Fluoride (PbF) F1Pb1(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0. 0. INFINITE -9.268 -78.243 -78.243 INFINITE 100 29.426 215.448 278.991 -6.354 -78.549 -87.893 45.910 200 32.232 236.643 253.043 -3.280 -79.464 -96.873 25.301 250 33.491 243.976 250.519 -1.636 -79.876 -101.177 21.140 298.15 34.399 249.957 249.957 0. -80.266 -105.244 18.438 300 34.429 250.170 249.958 0.064 -80.281 -105.399 18.352 350 35.115 255.531 250.380 1.803 -80.689 -109.553 16.350 400 35.622 260.255 251.325 3.572 -81.111 -113.648 14.841 450 36.004 264.474 252.555 5.363 -81.550 -117.689 13.661 500 36.298 268.283 253.941 7.171 -82.009 -121.680 12.712 600 36.717 274.941 256.902 10.823 -82.982 -129.524 11.276 700 36.998 280.623 259.895 14.510 -88.893 -136.401 10.178 800 37.201 285.578 262.802 18.220 -90.005 -143.112 9.344 900 37.357 289.969 265.581 21.949 -91.089 -149.685 8.687 1000 37.486 293.911 268.220 25.691 -92.146 -156.138 8.156 1100 37.601 297.490 270.721 29.445 -93.176 -162.488 7.716 1200 37.711 300.766 273.090 33.211 -94.178 -168.744 7.345 1300 37.823 303.789 275.337 36.988 -95.156 -174.918 7.028 1400 37.943 306.596 277.471 40.776 -96.126 -181.017 6.754 1500 38.075 309.219 279.501 44.577 -97.095 -187.047 6.514 1600 38.219 311.680 281.436 48.391 -98.067 -193.012 6.301 1700 38.378 314.002 283.284 52.221 -99.045 -198.917 6.112 1800 38.551 316.201 285.052 56.067 -100.030 -204.763 5.942 1900 38.737 318.290 286.747 59.932 -101.022 -210.555 5.789 2000 38.933 320.282 288.374 63.815 -102.019 -216.294 5.649 2100 39.138 322.186 289.939 67.719 -280.241 -214.868 5.345 2200 39.350 324.012 291.447 71.643 -280.854 -211.741 5.027 2300 39.567 325.766 292.901 75.589 -281.533 -208.584 4.737 2400 39.785 327.454 294.306 79.557 -282.279 -205.397 4.470 2500 40.004 329.083 295.664 83.546 -283.090 -202.177 4.224 2600 40.222 330.656 296.980 87.557 -283.963 -198.923 3.996 2700 40.436 332.178 298.256 91.590 -284.895 -195.635 3.785 2800 40.646 333.652 299.494 95.644 -285.880 -192.311 3.588 2900 40.850 335.082 300.696 99.719 -286.915 -188.951 3.403 3000 41.049 336.471 301.866 103.814 -287.991 -185.555 3.231 3100 41.240 337.820 303.004 107.929 -289.103 -182.122 3.069 3200 41.425 339.132 304.113 112.062 -290.244 -178.653 2.916 3300 41.602 340.409 305.193 116.213 -291.406 -175.148 2.772 3400 41.771 341.654 306.247 120.382 -292.584 -171.607 2.636 3500 41.933 342.867 307.276 124.567 -293.770 -168.032 2.508 3600 42.087 344.051 308.282 128.768 -294.958 -164.422 2.386 3700 42.234 345.206 309.264 132.985 -296.142 -160.780 2.270 3800 42.374 346.334 310.225 137.215 -297.316 -157.106 2.160 3900 42.508 347.436 311.165 141.459 -298.476 -153.401 2.055 4000 42.635 348.514 312.085 145.716 -299.616 -149.667 1.954 4100 42.756 349.568 312.986 149.986 -300.733 -145.904 1.859 4200 42.872 350.600 313.870 154.268 -301.823 -142.114 1.767 4300 42.983 351.610 314.736 158.560 -302.882 -138.299 1.680 4400 43.088 352.600 315.585 162.864 -303.909 -134.460 1.596 4500 43.189 353.569 316.418 167.178 -304.900 -130.597 1.516 4600 43.286 354.519 317.236 171.502 -305.855 -126.714 1.439 4700 43.379 355.451 318.040 175.835 -306.771 -122.809 1.365 4800 43.469 356.366 318.829 180.177 -307.648 -118.886 1.294 4900 43.555 357.263 319.604 184.529 -308.485 -114.944 1.225 5000 43.639 358.144 320.366 188.888 -309.281 -110.987 1.159 5100 43.720 359.009 321.115 193.256 -310.038 -107.013 1.096 5200 43.798 359.858 321.852 197.632 -310.753 -103.025 1.035 5300 43.874 360.693 322.577 202.016 -311.429 -99.024 0.976 5400 43.949 361.514 323.291 206.407 -312.066 -95.010 0.919 5500 44.021 362.321 323.993 210.805 -312.663 -90.985 0.864 5600 44.092 363.115 324.684 215.211 -313.223 -86.949 0.811 5700 44.162 363.896 325.365 219.624 -313.746 -82.904 0.760 5800 44.230 364.665 326.036 224.043 -314.234 -78.850 0.710 5900 44.297 365.421 326.698 228.470 -314.686 -74.788 0.662 6000 44.363 366.166 327.349 232.903 -315.105 -70.718 0.616