Niobium Chloride (NbCl5) Cl5Nb1(cr) T(K) Cp S -[G-H(Tr)]/T H-H(Tr) delta-f H delta-f G log Kf 0 100 200 298.15 147.904 214.053 214.053 0. -797.470 -684.141 119.859 300 147.904 214.968 214.056 0.274 -797.400 -683.438 118.997 400 147.904 257.518 219.858 15.064 -793.792 -646.006 84.360 478.900 147.904 284.145 228.321 26.734 CRYSTAL <--> LIQUID 500 147.904 290.522 230.813 29.854 790.494 609.446 63.668 600 147.904 317.488 243.080 44.645 -787.397 -573.530 49.930 700 147.904 340.287 255.380 59.435 -784.442 -538.121 40.155