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.
Hydrogen bonding and dipole-dipole forces at the polar caboxylate head groups do strenghten the interactions betweem stearic acid molecules, but over most of the surface of the molecule, the interactions are weaker van der Waals forces. Sucrose is polar and extensively hydrogen-bonded.ydrogen bonding and dipole-dipole forces at the polar caboxylate head groups do strenghten the interactions betweem stearic acid molecules, but over most of the surface of the molecule, the interactions are weaker van der Waals forces. Sucrose is polar and extensively hydrogen-bonded.