Problem: Of the following, __________ is the most volatile.A) CBr4B) CCl4C) CF4D) CH4E) C6H14

FREE Expert Solution

Most Volatile  Highest Vapor pressure 

if more vapor is present in the system → higher vapor pressure
more vapor present → weaker IMF
▪ therefore:    higher vapor pressure (↑ VP)  weaker IMF (↓ IMF)


Intermolecular Forces (IMF) are the attractive forces between 2 molecules.

  • weakest IMF →  London-Dispersion Forces  London-Dispersion Forcesmain IMF of nonpolar cpds

Comparing molecules with the same IMF:

  • smaller molecular weight (smaller molecule) → smaller area of interaction → weaker IMF
  • branched molecules → less surface area → less efficient area of interaction → weaker IMF
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Problem Details

Of the following, __________ is the most volatile.

A) CBr4

B) CCl4

C) CF4

D) CH4

E) C6H14

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