Tetrabromosilane (SiBr4) Br4Si1(l) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 298.15 146.440 278.236 278.236 0. -457.311 -443.896 77.769 300 146.440 279.142 278.239 0.271 -457.357 -443.812 77.275 400 146.440 321.270 283.983 14.915 -513.795 -427.415 55.815 500 146.440 353.947 294.829 29.559 -508.812 -406.401 42.456 600 146.440 380.646 306.975 44.203 -503.983 -386.374 33.637 700 146.440 403.220 319.153 58.847 -499.264 -367.147 27.397 800 146.440 422.774 330.911 73.491 -494.634 -348.591 22.761