Integrate the form of the Clausius Clapeyron equation dp/dT = pHvap/RT2 and then use that to compute the triple point temperature of a substance whose enthalpy of vaporization at the normal boiling point of 8.4 ° C is 21.84 kJ/mol, and whose triple point pressure is 84.5 Pa. ° C. [Report to 3 significant figures.]