If two compounds have similar or comparable molecular mass then on the basis of Intermolecular interactions, we can compare te boiling point of compounds.
since the boiling point is inversely proportional to vapor pressure, therefore we can also compare their vapor pressure.
molar mass of HF (compound B)= 20 g/mol
molar mass of hydrocarbon (compound A) = 30 g/mol
The molar masses of given compounds are nearly similar (difference of 10-15 g is OKAY !)
Order of strength of Intermolecular interactions:
The more the strength of intermolecular forces between the molecules, the higher will the boiling and melting point (because more energy is required to take them away from each other).
- Dipole-Dipole interactions are present in polar molecular.
- H-bonding is present between the highly electronegative atom (F, O, Cl) and the H-atoms attached with highly electronegative atoms (F, O, N).
Step by step
Solved in 5 steps
