question_answer

Although trimethylamine and n-propylamine have the same molecular weight, the former boils at a lower temperature (276 K) than the latter (322 K). Explain.

Answer:

                n-Propylamine has two H-atoms on the N-atom and hence undergoes intermolecular H-bonding thereby raising its boiling point. Trimethylamine, \[{{(C{{H}_{3}})}_{3}}N\]being a \[3{}^\circ \] amine does not have a H-atom on the N-atom. As a result, it does not undergo H-bonding and hence its boiling point is low.