Development of the Modern Freezer. Bacteria are usually the cause of food decay, but they can't grow as well or at all in freezing temperatures, which are at 32 degrees Fahrenheit (0 degrees Celsius) or lower.
HF- polar molecule: dipole-dipole forces. There are also dispersion forces and H bond between HF. BF3- nonpolar: dispersion forces. Ar- Dispersion forces between Ar atoms.
The strongest intermolecular forces in each case are: # 1 CHF_3#: dipole - dipole interaction. # 2 OF_2#: London dispersion forces. # HF#: hydrogen bonding.