Which of the following correctly gives the order of boiling points for the molecules hexane, pentanol, and ethoxypropane?
A) hexane ethoxypropane pentanol
B) hexane pentanol ethoxypropane
C) pentanol ethoxypropane hexane
D) pentanol hexane ethoxypropane

Question

Which of the following correctly gives the order of boiling points for the molecules hexane, pentanol, and ethoxypropane?
A) hexane > ethoxypropane > pentanol
B) hexane > pentanol > ethoxypropane
C) pentanol > ethoxypropane > hexane
D) pentanol > hexane > ethoxypropane

Quizplus · Accepted Answer

Both pentanol and ethoxypropane have hydrogen bonding, making them stronger intermolecular forces than hexane. Pentanol has a higher boiling point than ethoxypropane because it has a larger molecular size, resulting in stronger London dispersion forces. Therefore, the correct order is pentanol > ethoxypropane > hexane.

Which of the Following Correctly Gives the Order of Boiling