Sodium Sulfide (Na2S) Na2S1(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 82.801 96.232 96.232 0. -366.100 -354.552 62.116 300 82.843 96.744 96.234 0.153 -366.093 -354.480 61.720 400 84.308 120.780 99.501 8.512 -373.575 -350.129 45.722 500 85.772 139.753 105.719 17.017 -375.200 -344.086 35.946 600 87.236 155.522 112.742 25.668 -376.166 -337.761 29.405 700 88.701 169.081 119.844 34.466 -376.619 -331.319 24.723 800 90.165 181.023 126.760 43.411 -376.704 -324.838 21.210 900 91.337 191.717 133.394 52.491 -429.655 -317.282 18.415 1000 92.843 201.418 139.718 61.700 -428.077 -304.880 15.925 1100 110.458 210.823 145.749 71.581 -425.884 -292.653 13.897 1200 159.494 222.269 151.627 84.771 -614.002 -275.864 12.008 1276.000 211.921 233.718 156.162 98.962 Cp LAMBDA MAXIMUM 1276.000 211.939 233.718 156.162 98.962 TRANSITION 1300 187.652 237.411 157.629 103.718 -601.115 -248.179 9.972 1400 137.152 249.134 163.773 119.505 -591.403 -221.426 8.262 1445.000 133.888 253.390 166.498 125.559 CRYSTAL <--> LIQUID 1445.000 92.048 266.710 166.498 144.805 TRANSITION 1500 92.048 270.148 170.236 149.868 -567.131 -195.945 6.823 1600 92.048 276.089 176.668 159.073 -564.031 -171.301 5.592 1700 92.048 281.669 182.682 168.278 -560.947 -146.849 4.512 1800 92.048 286.931 188.329 177.482 -557.877 -122.579 3.557 1900 92.048 291.907 193.651 186.687 -554.820 -98.480 2.707 2000 92.048 296.629 198.683 195.892 -551.777 -74.541 1.947 2100 92.048 301.120 203.455 205.097 -548.747 -50.753 1.262 2200 92.048 305.402 207.992 214.302 -545.729 -27.110 0.644 2300 92.048 309.494 212.317 223.506 -542.725 -3.604 0.082 2400 92.048 313.411 216.448 232.711 -539.735 19.772 -0.430 2500 92.048 317.169 220.402 241.916 -536.760 43.024 -0.899 2600 92.048 320.779 224.194 251.121 -533.800 66.157 -1.329 2700 92.048 324.253 227.836 260.326 -530.858 89.176 -1.725 2800 92.048 327.600 231.339 269.530 -527.934 112.087 -2.091 2900 92.048 330.830 234.715 278.735 -525.032 134.893 -2.430 3000 92.048 333.951 237.971 287.940 -522.153 157.600 -2.744