explain-the-difference-in-boiling-points-in-the-following-pairs-of-compounds-i-t

Question

Explain the difference in boiling points in the following pairs of compounds:

i. The boiling point of ethanol (78 °C) is lower than methanediol (192 °C).

ii. The boiling point of ethanamine (17°C) is lower than ethanol (78 °C).

Accepted Answer

i. The molecules of methanediol have more hydrogen bonds between them.

ii. The molecules of ethanol form stronger hydrogen bonds between them.

Answer

i. Methanediol has a higher molar mass.

ii. Ethanol has a higher molar mass.

Answer

i. Methanediol has a higher molar mass.

ii. The molecules of ethanol form stronger hydrogen bonds between them.

Answer

i. The molecules of methanediol have more hydrogen bonds between them.

ii. Ethanol has a higher molar mass.