Topical Questions These questions are keyed to the major topics in the chapter. Usually...

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.

Methanol, CH₃OH, has a normal boiling point of 64.7 °C and a vapor pressure of 100 mm Hg at 21.2 °C. Formaldehyde, has a normal boiling point of -19.5 °C and a vapor pressure of 100 mm Hg at -57.3 °C. Explain why these two compounds have different boiling points and require different temperatures to achieve the same vapor pressure.