Question

Predict the relative boiling points for the following molecules, putting the highest at the top of the list. student submitted image, transcription available belowMolecules CH₃CH(CH₃)CH₂CH₂CH₃ CH₃CH₂NHCH₂CH₂CH₂CH₃ CH₂(OH)CH₂CH₂CH₂(OH) N(CH₂CH₃)₃ CH₂(NH₂)CH₂CH₂CH₂(NH₂) CH₃C(CH₃)₂CH₂CH₃ Highest a.1 b.2 c.3 d.4 e.5 f.6

Answer 1

When predicting the relative boiling points of molecules, we consider the intermolecular forces and molar mass. The compound with the strongest intermolecular forces will have the highest boiling point. Based on these considerations, the molecules in order of increasing boiling point are: CH₃CH(CH₃)CH₂CH₂CH₃, CH₃CH₂NHCH₂CH₂CH₂CH₃, CH₂(OH)CH₂CH₂CH₂(OH), CH₃C(CH₃)₂CH₂CH₃, CH₂(NH₂)CH₂CH₂CH₂(NH₂), N(CH₂CH₃)₃. Therefore, the answer is f.6.

Step-by-step explanation:

When predicting the relative boiling points of molecules, we must consider the intermolecular forces and the molar mass of each compound. The compound with the strongest intermolecular forces will have the highest boiling point.

In this case, we can determine the strength of intermolecular forces by considering the polarity of the molecules and their ability to form hydrogen bonds. Generally, molecules with greater molecular size and polarity will have higher boiling points.

Based on this information, we can arrange the given molecules in order of increasing boiling point:

1. CH₃CH(CH₃)CH₂CH₂CH₃
2. CH₃CH₂NHCH₂CH₂CH₂CH₃
3. CH₂(OH)CH₂CH₂CH₂(OH)
4. CH₃C(CH₃)₂CH₂CH₃
5. CH₂(NH₂)CH₂CH₂CH₂(NH₂)
6. N(CH₂CH₃)₃

Therefore, the correct answer is f.6.