Potassium Sulfide (K2S) K2S1(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 74.684 115.060 115.060 0. -376.560 -362.745 63.551 300 74.726 115.522 115.061 0.138 -376.573 -362.659 63.145 400 77.320 137.375 118.023 7.741 -384.524 -356.897 46.606 500 79.914 154.907 123.702 15.602 -386.806 -349.730 36.536 600 82.508 169.706 130.167 23.723 -388.349 -342.158 29.787 700 85.144 182.621 136.757 32.105 -389.306 -334.377 24.952 800 87.738 194.161 143.224 40.749 -389.826 -326.490 21.318 900 103.554 205.100 149.486 50.053 -442.745 -317.488 18.427 1000 156.063 218.274 155.672 62.602 -438.078 -303.773 15.867 1050.000 194.982 226.816 158.850 71.364 Cp HUMP MAXIMUM 1050.000 194.985 226.816 158.850 71.364 TRANSITION 1100 142.340 234.558 162.127 79.675 -586.914 -281.577 13.371 1200 142.340 246.943 168.686 93.908 -578.724 -254.180 11.064 1221.000 142.340 249.413 170.053 96.898 CRYSTAL <--> LIQUID 1221.000 100.960 262.640 170.053 113.048 TRANSITION 1300 100.960 268.969 175.874 121.024 -557.669 -228.408 9.178 1400 100.960 276.451 182.794 131.120 -553.649 -203.231 7.583 1500 100.960 283.417 189.273 141.216 -549.646 -178.341 6.210 1600 100.960 289.932 195.363 151.312 -545.660 -153.717 5.018 1700 100.960 296.053 201.107 161.408 -541.691 -129.343 3.974 1800 100.960 301.824 206.544 171.504 -537.742 -105.201 3.053 1900 100.960 307.282 211.704 181.600 -533.813 -81.278 2.234 2000 100.960 312.461 216.613 191.696 -529.907 -57.562 1.503 2100 100.960 317.387 221.296 201.792 -526.026 -34.040 0.847 2200 100.960 322.084 225.771 211.888 -522.174 -10.702 0.254 2300 100.960 326.571 230.057 221.984 -518.353 12.461 -0.283 2400 100.960 330.868 234.168 232.080 -514.569 35.458 -0.772 2500 100.960 334.990 238.119 242.176 -510.825 58.299 -1.218 2600 100.960 338.949 241.922 252.272 -507.125 80.991 -1.627 2700 100.960 342.760 245.586 262.368 -503.476 103.541 -2.003 2800 100.960 346.431 249.123 272.464 -499.882 125.957 -2.350 2900 100.960 349.974 252.540 282.560 -496.350 148.246 -2.670 3000 100.960 353.397 255.845 292.656 -492.887 170.414 -2.967