e of at – ent U lable 4C.1 to calculate the vapor pressure of bo melcury at 275 K. SA.7 The vapor pressure of boron trichloride at- and its enthalpy of vaporization is 23 mal boiling point of boron trichloride? 5A .77 kJ mol- . What is the nor- ar 5A.8 The vapor pressure of dimethyl ether at -58 °C is 18.1 kPa and its enthalpy of vaporization is 21.51 kJ mol’. What is the normal boiling point of dimethyl ether? i 5A.9 Arsine, AsH, is a highly toxic compound used in the elec- tronics industry for the production of semiconductors. Its vapor pressure is 35 Torr at-1 11.95 ? and 253 Torr at-83.6? Using these data, calculate (a) the standard enthalpy of vaporization