Lead Oxide (PbO) O1Pb1(g) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0. 0. INFINITE -8.961 72.550 72.550 INFINITE 100 29.136 207.019 267.535 -6.052 72.241 63.887 -33.371 200 30.424 227.495 242.946 -3.090 71.222 55.926 -14.606 250 31.516 234.401 240.568 -1.542 70.736 52.159 -10.898 298.15 32.508 240.039 240.039 0. 70.291 48.622 -8.518 300 32.544 240.240 240.039 0.060 70.275 48.487 -8.442 350 33.415 245.324 240.439 1.710 69.832 44.891 -6.700 400 34.123 249.834 241.337 3.399 69.399 41.358 -5.401 450 34.692 253.887 242.510 5.120 68.965 37.879 -4.397 500 35.149 257.567 243.834 6.866 68.523 34.448 -3.599 600 35.822 264.039 246.677 10.417 67.605 27.719 -2.413 700 36.281 269.597 249.564 14.024 61.762 21.946 -1.638 800 36.608 274.464 252.378 17.669 60.722 16.329 -1.066 900 36.852 278.791 255.077 21.342 59.707 10.841 -0.629 1000 37.040 282.684 257.646 25.038 58.717 5.465 -0.285 1100 37.191 286.222 260.086 28.749 57.749 0.187 -0.009 1200 37.315 289.463 262.401 32.475 56.807 -5.004 0.218 1300 37.420 292.454 264.599 36.212 55.881 -10.118 0.407 1400 37.510 295.231 266.689 39.958 54.958 -15.160 0.566 1500 37.590 297.821 268.679 43.713 54.029 -20.136 0.701 1600 37.662 300.250 270.577 47.476 53.085 -25.050 0.818 1700 37.727 302.535 272.390 51.245 52.123 -29.904 0.919 1800 37.788 304.693 274.126 55.021 51.139 -34.701 1.007 1900 37.844 306.738 275.789 58.803 50.131 -39.442 1.084 2000 37.898 308.680 277.385 62.590 49.097 -44.130 1.153 2100 37.951 310.530 278.920 66.382 -129.185 -41.650 1.036 2200 38.003 312.297 280.397 70.180 -129.884 -37.465 0.890 2300 38.054 313.988 281.821 73.983 -130.678 -33.247 0.755 2400 38.108 315.608 283.195 77.791 -131.568 -28.993 0.631 2500 38.164 317.165 284.523 81.605 -132.554 -24.699 0.516 2600 38.224 318.663 285.808 85.424 -133.636 -20.363 0.409 2700 38.290 320.107 287.051 89.250 -134.811 -15.985 0.309 2800 38.362 321.501 288.257 93.082 -136.073 -11.561 0.216 2900 38.444 322.848 289.427 96.922 -137.418 -7.091 0.128 3000 38.536 324.153 290.563 100.771 -138.838 -2.573 0.045 3100 38.641 325.418 291.667 104.630 -140.326 1.994 -0.034 3200 38.760 326.647 292.741 108.500 -141.875 6.609 -0.108 3300 38.895 327.842 293.786 112.383 -143.474 11.274 -0.178 3400 39.048 329.005 294.805 116.280 -145.115 15.988 -0.246 3500 39.220 330.139 295.799 120.193 -146.789 20.751 -0.310 3600 39.413 331.247 296.768 124.124 -148.487 25.562 -0.371 3700 39.629 332.330 297.714 128.076 -150.200 30.420 -0.429 3800 39.869 333.390 298.639 132.051 -151.919 35.325 -0.486 3900 40.134 334.429 299.544 136.051 -153.635 40.275 -0.539 4000 40.425 335.448 300.429 140.079 -155.342 45.268 -0.591 4100 40.743 336.450 301.295 144.137 -157.030 50.304 -0.641 4200 41.088 337.436 302.144 148.228 -158.693 55.381 -0.689 4300 41.461 338.407 302.976 152.355 -160.324 60.498 -0.735 4400 41.862 339.365 303.792 156.521 -161.917 65.652 -0.779 4500 42.290 340.311 304.593 160.729 -163.466 70.841 -0.822 4600 42.746 341.245 305.380 164.980 -164.965 76.064 -0.864 4700 43.229 342.169 306.153 169.279 -166.410 81.320 -0.904 4800 43.738 343.085 306.913 173.627 -167.797 86.606 -0.942 4900 44.272 343.992 307.660 178.027 -169.121 91.920 -0.980 5000 44.830 344.892 308.396 182.482 -170.380 97.260 -1.016 5100 45.410 345.786 309.120 186.994 -171.571 102.625 -1.051 5200 46.012 346.673 309.834 191.565 -172.690 108.012 -1.085 5300 46.634 347.555 310.537 196.197 -173.736 113.420 -1.118 5400 47.273 348.433 311.231 200.892 -174.708 118.847 -1.150 5500 47.928 349.306 311.915 205.652 -175.605 124.292 -1.180 5600 48.596 350.176 312.591 210.478 -176.425 129.752 -1.210 5700 49.277 351.042 313.258 215.372 -177.168 135.226 -1.239 5800 49.966 351.905 313.917 220.334 -177.834 140.713 -1.267 5900 50.663 352.765 314.568 225.365 -178.423 146.210 -1.294 6000 51.364 353.623 315.212 230.466 -178.938 151.717 -1.321