Hydrazine (N2H4) H4N2(l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 87.236 21.037 205.395 -18.436 48.895 82.918 -43.312 200 93.094 83.302 130.399 -9.419 49.613 116.715 -30.483 298.15 98.840 121.544 121.544 0. 50.626 149.440 -26.181 300 98.952 122.156 121.546 0.183 50.649 150.054 -26.127 400 107.361 151.693 125.516 10.471 52.208 182.975 -23.894 500 116.566 176.639 133.305 21.667 54.619 215.406 -22.503 600 125.771 198.705 142.398 33.784 57.895 247.270 -21.527 700 134.976 218.784 151.896 46.822 62.013 278.518 -20.783 800 144.181 237.409 161.435 60.779 66.957 309.120 -20.183