Phosphorus Sulfide (P4S3) P4S3(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 146.440 200.832 200.832 0. -224.647 -206.864 36.242 300 146.440 201.738 200.835 0.271 -224.679 -206.754 35.999 400 146.440 243.866 206.579 14.915 -236.834 -199.434 26.043 440.000 146.440 257.823 210.613 20.773 CRYSTAL <--> LIQUID 500 146.440 276.543 217.425 29.559 244.505 189.235 19.769 600 146.440 303.242 229.571 44.203 -251.145 -177.539 15.456 700 146.440 325.816 241.749 58.847 -257.072 -164.797 12.297 800 146.440 345.370 253.507 73.491 -262.592 -151.234 9.875 900 146.440 362.619 264.691 88.135 -427.249 -133.753 7.763 1000 146.440 378.048 275.269 102.779 -428.703 -101.065 5.279 1100 146.440 392.005 285.257 117.423 -430.204 -68.228 3.240 1200 146.440 404.747 294.691 132.067 -686.040 -30.940 1.347 1300 146.440 416.468 303.614 146.711 -684.535 23.590 -0.948 1400 146.440 427.321 312.067 161.355 -683.095 78.007 -2.910 1500 146.440 437.424 320.091 175.999 -681.718 132.323 -4.608 1600 146.440 446.875 327.723 190.643 -680.401 186.549 -6.090 1700 146.440 455.753 334.996 205.287 -679.139 240.694 -7.396 1800 146.440 464.123 341.939 219.931 -677.929 294.767 -8.554 1900 146.440 472.041 348.580 234.575 -676.769 348.774 -9.588 2000 146.440 479.552 354.943 249.219 -675.654 402.721 -10.518