Sulfuric Acid (O2S(OH)2) H2O4S1(cr,l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 0. 0. INFINITE -28.226 -811.969 -811.969 INFINITE 100 45.142 42.586 300.474 -25.789 -819.030 -777.302 406.021 200 73.587 82.684 181.887 -19.841 -823.240 -733.773 191.642 283.456 96.902 112.175 157.073 -12.727 CRYSTAL <--> LIQUID 283.456 135.770 149.962 157.073 -2.016 TRANSITION 298.15 138.584 156.895 156.895 0. -813.989 -689.918 120.871 300 138.940 157.753 156.897 0.257 -813.936 -689.149 119.991 400 158.205 200.356 162.576 15.112 -812.526 -647.968 84.616 500 177.619 237.744 173.938 31.903 -808.704 -607.248 63.439 600 197.033 271.844 187.451 50.636 -802.804 -567.476 49.403 700 216.447 303.674 201.804 71.310 -794.924 -528.851 39.463 800 235.860 333.844 216.438 93.925 -785.146 -491.486 32.091 900 255.274 362.745 231.099 118.482 -826.632 -454.377 26.371 1000 274.688 390.646 245.666 144.980 -811.918 -413.788 21.614