Potassium Peroxide (K2O2) K2O2(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 250 298.15 100.165 112.968 112.968 0. -495.804 -429.758 75.292 300 100.374 113.588 112.970 0.185 -495.782 -429.348 74.756 400 107.110 143.348 116.982 10.546 -499.349 -406.479 53.081 500 115.478 168.206 124.802 21.702 -497.468 -383.461 40.060 600 120.708 189.704 133.869 33.501 -494.907 -360.891 31.418 700 127.952 208.862 143.236 45.938 -491.716 -338.798 25.281 800 134.725 226.395 152.550 59.076 -487.870 -317.208 20.712 900 140.798 242.614 161.667 72.852 -483.464 -296.134 17.187 1000 146.858 257.762 170.527 87.235 -478.569 -275.578 14.395 1100 152.917 272.043 179.112 102.224 -631.126 -246.314 11.696 1200 158.959 285.608 187.426 117.818 -623.239 -211.675 9.214 1300 164.983 298.569 195.481 134.015 -614.782 -177.717 7.141 1400 170.992 311.016 203.292 150.814 -605.755 -144.431 5.389 1500 176.983 323.018 210.876 168.213 -596.156 -111.812 3.894 1600 182.958 334.631 218.249 186.210 -585.988 -79.850 2.607 1700 188.916 345.901 225.428 204.804 -575.251 -48.542 1.492 1800 194.857 356.868 232.427 223.993 -563.948 -17.883 0.519 1900 200.782 367.562 239.259 243.775 -552.083 12.133 -0.334 2000 206.690 378.011 245.937 264.148 -539.660 41.509 -1.084