Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Mercury is highly toxic. Although it is a liquid at room temperature, it has a high vapor pressure and a low enthalpy of vaporization (294 J/g). What quantity of thermal energy transfer is required to vaporize 0.500 mL mercury at 357 °C, its normal boiling point? The density of Hg (l) is 13.6 g/mL. Compare this thermal energy transfer with the amount needed to vaporize 0.500 mL water. See Table 11.2 for the molar enthalpy of vaporization of H2O.
Table 11.2
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