Chapter 9, Problem 18QRT

Mercury is highly toxic. Although it is a liquid at room temperature, it has a high vapor pressure and a low vaporization enthalpy (294 J/g). Calculate the heat energy transfer required to vaporize 0.500 mL mercury at 357 °C, its normal boiling point. The density of $\text{Hg}\left(\ell \right)$ is 13.6 g/mL. Compare your result with the energy transfer needed to vaporize 0.500 mL water. The molar vaporization enthalpy of H₂O is 40.7 kJ/mol.