Lead Oxide (PbO) O1Pb1(cr,l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0.000 0.000 INFINITE -9.109 -217.297 -217.297 INFINITE 100 26.870 24.765 101.583 -7.682 -219.089 -209.218 109.284 200 40.476 48.028 69.262 -4.247 -219.634 -199.037 51.983 298.15 45.773 66.316 66.316 0.000 -219.409 -189.283 33.162 300 45.866 66.600 66.317 0.085 -219.401 -189.096 32.925 400 50.375 80.434 68.173 4.904 -218.796 -179.077 23.385 500 53.430 92.066 71.821 10.123 -217.921 -169.245 17.681 600 55.396 101.992 76.042 15.570 -216.942 -159.601 13.894 700 56.651 110.626 80.380 21.172 -220.789 -149.325 11.143 762.000 57.430 115.466 83.040 24.709 I <--> II 762.000 54.495 115.690 83.040 24.880 TRANSITION 800 55.028 118.355 84.654 26.961 -219.687 -139.192 9.088 900 56.409 124.917 88.769 32.533 -218.803 -129.182 7.498 1000 57.764 130.930 92.689 38.242 -217.779 -119.277 6.230 1100 59.099 136.499 96.421 44.085 -216.615 -109.482 5.199 1159.000 59.884 139.607 98.541 47.595 II <--> LIQUID 1159.000 65.000 161.628 98.541 73.117 TRANSITION 1200 65.000 163.887 100.735 75.782 -189.586 -100.706 4.384 1300 65.000 169.090 105.796 82.282 -187.748 -93.374 3.752 1400 65.000 173.907 110.491 88.782 -185.918 -86.183 3.216 1500 65.000 178.392 114.870 95.282 -184.103 -79.123 2.755 1600 65.000 182.587 118.973 101.782 -182.309 -72.183 2.357 1700 65.000 186.527 122.832 108.282 -180.540 -65.354 2.008 1800 65.000 190.243 126.475 114.782 -178.800 -58.629 1.701 1900 65.000 193.757 129.924 121.282 -177.089 -52.000 1.430 2000 65.000 197.091 133.200 127.782 -175.410 -45.459 1.187 2100 65.000 200.262 136.318 134.282 -350.985 -31.887 0.793 2200 65.000 203.286 139.294 140.782 -348.982 -16.739 0.397 2300 65.000 206.176 142.140 147.282 -347.078 -1.681 0.038 2400 65.000 208.942 144.866 153.782 -345.276 13.298 -0.289 2500 65.000 211.595 147.482 160.282 -343.577 28.203 -0.589