Question

Chemistry 2 help with lab questions!

Intermolecular forces are not chemical bonds. Explain the difference. When answering the rest of the essay questions, use language that clearly distinguishes between chemical bonds and intermolecular forces.

Why do compounds with higher intermolecular forces have higher boiling points? Show that you understand why a higher temperature is needed to boil a compound that has stronger intermolecular forces.

Which has greater dispersion forces, hexane or pentane? How can you use their molecular formulas to predict this? (Hint: it might help to use numerical data here to prove your answer.)

Why does 1-butanol have a higher boiling point than hexane despite the fact that hexane’s molecules are significantly larger? Explain in terms of the types and relative strengths of their intermolecular forces.

Why does 2-butanone have a higher boiling point than pentane despite the fact that their molecules are practically the same size? Explain in terms of the types and relative strengths of their intermolecular forces.

Why does 1-butanol have a higher boiling point than 2-butanone despite the fact that their molecules are practically the same size? Explain in terms of the types and relative strengths of their intermolecular forces.

Why does hexane have a higher boiling point than pentane? Explain in terms of the types and relative strengths of their intermolecular forces.

The normal boiling point of hexadecane, C₁₆H₃₄, is 288ºC. Why does hexadecane have a higher boiling point than 1-butanol despite the fact that hexadecane is nonpolar while 1-butanol can undergo hydrogen bonding? Explain in terms of the types and relative strengths of their intermolecular forces.

Answer 1