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

Question

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

Quizplus · Accepted Answer

Pentanol is an alcohol which has hydrogen bonding, making it have a higher boiling point than the other two molecules. Ethyl propyl ether does not have hydrogen bonding, but has a polar bond, so its boiling point is higher than hexane, which is nonpolar. Therefore, the order of boiling points is pentanol > ethyl propyl ether > hexane.

Which of the Following Correctly Gives the Order of Boiling