Titanium tetrachloride, TiCl, has a melting point of -23.2 C and has a AH fusion = 9.37 kJ/mol. 1. How much energy is required to melt 263.1 g TiC14? Pressure (kPa) 22,089 Ice (solid) Water (liquid) 101 0.6 A Triple point B 0 0.01 Water vapor (gas) 100 374 Critical point C Temperature (C) The pressure and temperature axes on this phase diagram of water are not drawn to constant scale in order to illustrate several important properties.