Octanol (C8H18O) is a compound used for the synthesis of important component in perfume production (esters). The approximate enthalpy of vaporization of 1-octanol was found to be 72.37 kJ mol–1 and the vapor pressure of 1-octanol was measured to be 6.863 kPa at 20.05 °C. At what temperature (in °C, to two decimal places) would the vapor pressure of 1-octanol equal 0.781 kPa?

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