How does polarity affect melting point?
Subsequently, one may also ask, how does polarity affect boiling point?
Principle: The greater the forces of attraction the higher the boiling point or the greater the polarity the higher the boiling point. The other molecules are slightly polar and show the increase in boiling point with molecular weight which is normal. Instead, water boils at +100 C, which is very abnormal.
- Inter Molecular Forces. When the attraction between molecules are weaker, we can say that the inter molecular forces are weak.
- Shape of Molecules. Shapes of molecules also affect the melting of a substance.
- Size of Molecules.
- Other Factors.
Simply so, do polar bonds have high melting points?
Polar molecules have strong intermolecular forces of attraction. It takes more energy to separate the molecules from each other, so polar substances have relatively high melting points and boiling points.
Substances with hydrogen bonding, an intermolecular force, will have much higher melting and boiling points than those that have ordinary dipole-dipole intramolecular forces. Non-polar molecules have the lowest melting and boiling points, because they are held together by the weak van der Waals forces.