Question

Which is expected to have a higher boiling point? why? CH3CH2OH or CH3CH2NH2​

Answer 1

Ethanol (CH3CH2OH) is expected to have a higher boiling point than ethylamine (CH3CH2NH2) due to the presence of stronger hydrogen bonding from its -OH group.

Step-by-step explanation:

To determine which compound has a higher boiling point between CH3CH2OH (ethanol) and CH3CH2NH2 (ethylamine), we need to consider their molecular structures. Both compounds are similar in size and mass, but the types of intermolecular forces (IMFs) they exhibit are different. Ethanol contains an -OH group, which allows it to participate in strong hydrogen bonding, while ethylamine, with its -NH2 group, also forms hydrogen bonds but typically weaker than those formed by -OH groups.

The presence of stronger hydrogen bonding in ethanol gives it stronger IMFs compared to ethylamine. Therefore, ethanol is expected to have a higher boiling point than ethylamine because more energy is required to break the stronger hydrogen bonds during the phase transition from liquid to vapor.

Answer 2

Explanation: Ethanol, CH3CH2OH, has the highest of the three boiling points because it has the strongest dipole–dipole forces between molecules due to hydrogen bonding. ... Dimethyl ether, CH3OCH3, has the second- highest boiling point because it has dipole–dipole forces between molecules.