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.
One of the strongest intermolecular forces (i.e. non-covalent) is the H-bond. H-bonds hold between 1 and 5 kcal/mol in free energy. Ionic bonds can also be strong, but they depend on the charge of each of the two oppositely charged molecules and the distance between them (following Coulombâs law).