Sodium Sulfate, Delta (Na2SO4) Na2O4S1(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 155.812 163.212 163.212 0. -1379.294 -1265.387 221.690 300 155.896 164.176 163.215 0.288 -1379.261 -1264.680 220.200 400 163.050 210.099 169.427 16.269 -1385.063 -1226.248 160.132 500 166.251 246.782 181.355 32.714 -1384.866 -1186.573 123.960 600 171.816 277.574 194.889 49.611 -1383.905 -1146.990 99.854 700 178.113 304.516 208.664 67.097 -1382.180 -1107.631 82.652 800 185.707 328.766 222.184 85.266 -1379.714 -1068.569 69.770 900 195.979 351.212 235.287 104.333 -1429.489 -1028.786 59.709 1000 208.112 372.490 247.951 124.539 -1423.838 -984.557 51.428 1100 220.413 392.907 260.207 145.970 -1417.113 -940.945 44.682 1200 232.086 412.592 272.090 168.602 -1602.887 -893.112 38.876 1300 242.881 431.600 283.633 192.357 -1592.358 -834.384 33.526 1400 252.923 449.977 294.862 217.160 -1580.856 -776.504 28.972 1500 261.333 467.723 305.798 242.887 -1568.503 -719.477 25.054