Editing Chemical polarity (section)

===Boiling point===
When comparing a polar and nonpolar molecule with similar molar masses, the polar molecule in general has a higher boiling point, because the dipole–dipole interaction between polar molecules results in stronger intermolecular attractions. One common form of polar interaction is the [[hydrogen bond]], which is also known as the H-bond. For example, water forms H-bonds and has a molar mass M = 18 and a boiling point of +100&nbsp;°C, compared to nonpolar [[methane]] with M = 16 and a boiling point of −161&nbsp;°C.