Phosphine (PH3) H3P1(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0. 0. INFINITE -10.136 30.811 30.811 INFINITE 100 33.259 173.027 241.134 -6.811 28.751 28.326 -14.796 200 33.933 196.180 213.516 -3.467 25.790 28.803 -7.523 250 35.259 203.881 210.843 -1.740 24.331 29.723 -6.210 298.15 37.102 210.243 210.243 0. 22.886 30.893 -5.412 300 37.180 210.473 210.244 0.069 22.831 30.943 -5.388 350 39.422 216.370 210.704 1.983 20.636 32.483 -4.848 400 41.782 221.787 211.755 4.013 19.164 34.277 -4.476 450 44.151 226.845 213.154 6.161 17.806 36.249 -4.208 500 46.478 231.618 214.764 8.427 16.562 38.366 -4.008 600 50.905 240.489 218.323 13.299 14.408 42.937 -3.738 700 54.935 248.644 222.080 18.595 12.664 47.835 -3.569 800 58.511 256.218 225.879 24.271 11.279 52.958 -3.458 900 61.623 263.294 229.648 30.282 10.195 58.235 -3.380 1000 64.300 269.929 233.348 36.581 9.356 63.620 -3.323 1100 66.585 276.167 236.960 43.128 8.712 69.079 -3.280 1200 68.532 282.047 240.474 49.887 -55.351 75.668 -3.294 1300 70.191 287.599 243.888 56.825 -54.952 86.571 -3.478 1400 71.608 292.854 247.199 63.917 -54.469 97.440 -3.636 1500 72.822 297.837 250.411 71.140 -53.925 108.272 -3.770 1600 73.867 302.571 253.524 78.476 -53.336 119.066 -3.887 1700 74.770 307.077 256.543 85.909 -52.717 129.822 -3.989 1800 75.554 311.374 259.470 93.426 -52.077 140.541 -4.078 1900 76.238 315.477 262.311 101.016 -51.424 151.224 -4.157 2000 76.837 319.404 265.068 108.671 -50.766 161.873 -4.228 2100 77.365 323.165 267.746 116.381 -50.107 172.489 -4.290 2200 77.831 326.775 270.347 124.142 -49.451 183.073 -4.347 2300 78.244 330.244 272.877 131.946 -48.800 193.628 -4.397 2400 78.612 333.582 275.337 139.789 -48.158 204.155 -4.443 2500 78.942 336.798 277.732 147.667 -47.526 214.655 -4.485 2600 79.237 339.900 280.063 155.576 -46.906 225.130 -4.523 2700 79.504 342.896 282.335 163.514 -46.299 235.581 -4.558 2800 79.744 345.792 284.550 171.476 -45.707 246.010 -4.589 2900 79.962 348.594 286.711 179.462 -45.129 256.418 -4.619 3000 80.160 351.308 288.819 187.468 -44.567 266.807 -4.646 3100 80.340 353.939 290.877 195.493 -44.022 277.177 -4.670 3200 80.505 356.493 292.888 203.535 -43.495 287.530 -4.693 3300 80.655 358.972 294.853 211.593 -42.984 297.866 -4.715 3400 80.794 361.382 296.775 219.666 -42.493 308.188 -4.735 3500 80.921 363.726 298.654 227.752 -42.020 318.495 -4.753 3600 81.039 366.007 300.494 235.850 -41.566 328.789 -4.771 3700 81.147 368.229 302.294 243.959 -41.132 339.070 -4.787 3800 81.247 370.395 304.058 252.079 -40.718 349.341 -4.802 3900 81.340 372.506 305.786 260.208 -40.324 359.600 -4.816 4000 81.427 374.567 307.480 268.347 -39.951 369.850 -4.830 4100 81.507 376.578 309.141 276.494 -39.599 380.090 -4.842 4200 81.582 378.544 310.770 284.648 -39.268 390.323 -4.854 4300 81.652 380.464 312.369 292.810 -38.958 400.548 -4.866 4400 81.718 382.342 313.938 300.978 -38.670 410.765 -4.876 4500 81.779 384.179 315.478 309.153 -38.403 420.976 -4.887 4600 81.836 385.977 316.991 317.334 -38.157 431.182 -4.896 4700 81.890 387.738 318.478 325.520 -37.932 441.383 -4.905 4800 81.941 389.462 319.939 333.712 -37.728 451.579 -4.914 4900 81.988 391.152 321.375 341.908 -37.544 461.770 -4.923 5000 82.033 392.809 322.787 350.110 -37.380 471.959 -4.931 5100 82.076 394.434 324.176 358.315 -37.236 482.144 -4.938 5200 82.116 396.028 325.543 366.525 -37.110 492.327 -4.945 5300 82.153 397.593 326.887 374.738 -37.002 502.508 -4.953 5400 82.189 399.129 328.211 382.955 -36.911 512.686 -4.959 5500 82.223 400.637 329.514 391.176 -36.837 522.863 -4.966 5600 82.255 402.119 330.798 399.400 -36.777 533.039 -4.972 5700 82.286 403.575 332.062 407.627 -36.732 543.214 -4.978 5800 82.315 405.006 333.307 415.857 -36.699 553.388 -4.984 5900 82.342 406.414 334.534 424.090 -36.679 563.561 -4.989 6000 82.368 407.798 335.744 432.325 -36.668 573.735 -4.995