The vapor pressure of trichloromethane is 40.0 mmHg at -7 degrees C, and its heat of vaporization is 29.3 kJ/mol. Estimate the normal boiling point of trichloromethane. This is what I have thus far: ln 760/40 = -29200 J/mol / 8.314 J/mol x k (1/T2 - 1/ 266)