Question

question 26 (1 point)
listen
in the imf labs, you learned how to identify polar and nonpolar molecules. you also learned how to draw hydrogen bonds; one of the intermolecular forces (imfs). imfs affect properties, such as boiling point, of substances.
which of the following compounds should have the highest boiling point?
n - butylamine
n, n - dimethyl ethylamine
they would all have the same boiling point.
dimethylamine
n - butylamine
n, n - dimethyl ethylamine

Explanation:

Hydrogen bonding is a strong intermolecular force. Compounds that can form more hydrogen bonds will have higher boiling points. N - butylamine (\(H_2N - CH_2CH_2CH_2CH_3\)) has two hydrogen atoms attached to the nitrogen atom, which can form hydrogen bonds. Dimethylamine (\(HN(CH_3)_2\)) has one hydrogen atom attached to the nitrogen atom, so it can form fewer hydrogen bonds than N - butylamine. N,N - dimethyl ethylamine (\(N(CH_3)_2CH_2CH_3\)) has no hydrogen atoms attached to the nitrogen atom, so it cannot form hydrogen bonds. Since hydrogen bonding increases boiling point, the compound with the most hydrogen - bonding capability (N - butylamine) will have the highest boiling point.

Answer:

n - butylamine