Towards the end of the year, the weather in Seville starts to become slightly milder. In October, the sun shines for at least 7 hours per day but brace yourself for rain as there are on average 6 days of rainfall during the month.
When a molecule has no dipole moment, like CO2, then it is nonpolar. When a molecule has a dipole moment like water, then it is polar. This polarity business is very important. Polar molecules are like little magnets, with a positive end and a negative end, and they interact with each other through magnetic attractions.
Dipole-dipole attractions. In addition to the attractive London dispersion forces, we now have a situation where the molecule is polar. We say that the molecule has a permanent dipole. Now, the molecules line up.The positive ends end up near to another molecule's negative end: Since this dipole is permanent, the attraction is stronger.However, we only see this sort of attraction between molecules that are polar. It is usually referred to as dipole-dipole interaction.n addition to the attractive London dispersion forces, we now have a situation where the molecule is polar. We say that the molecule has a permanent dipole. Now, the molecules line up. The positive ends end up near to another molecule's negative end: Since this dipole is permanent, the attraction is stronger.