Tungstic Acid (O2W(OH)2) H2O4W1(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 112.633 144.766 144.766 0. -1131.772 -1003.905 175.880 300 112.968 145.464 144.769 0.209 -1131.770 -1003.112 174.657 400 129.704 180.255 149.399 12.342 -1130.949 -960.310 125.404 500 146.440 211.003 158.697 26.153 -1128.693 -917.882 95.890 600 159.829 238.972 169.783 41.513 -1125.138 -876.036 76.266 700 170.707 264.509 181.518 58.094 -1120.606 -834.865 62.298 800 176.565 287.724 193.367 75.485 -1115.486 -794.391 51.868 900 182.422 308.889 205.044 93.461 -1109.985 -754.580 43.795 1000 186.606 328.326 216.414 111.912 -1104.195 -715.399 37.369