CHE 102 Lecture Notes - Lecture 2: Dimethyl Ether, Electric Potential, Chemical Polarity

• School: University at Buffalo
• Department: Chemistry
• Course: CHE 102
• Professor: Gulde Stacey

Document Summary

Boiling points and intermolecular forces oboiling points are a measure of intermolecular forces. Molecules of approximately equal mass and size, the stronger intermolecular forces, the higher its boiling point. Atoms held together by electrostatic forces catreating thes) Electrons in a covalent bond are not always shared equally resulting in polarity. Uneven sharing results in polar bonds : One end of the molecule has more electron density than other (negative ball. Greater the difference in electronegativity, the greater the polarity of in the band -> cincreased dipole moment, increased polarity) "the ability of an atom in a molecle to attract electrons to itself: left to rigl. * electronegativity value: bottom to top has no units. Electrons spend more time around the more electronegative atom. Results in a partial negative charge, other atom is more positive. Two equal, but opposite, charges are separated by a distance, dipole forms.