5.7 Intermolecular Forces

Question 1

What are intermolecular forces?

Answer 1

relatively weak interactions that take place between neutral molecules

Question 2

What are ion-dipole forces?

Answer 2

attraction between polar molecules and ions

Question 3

What are dipole-dipole forces?

Answer 3

attractions between positive end of one polar molecule and the negative end of another polar molecule

Question 4

What is a dipole-induced dipole force?

Answer 4

permanent dipole in one molecule may induce a dipole in a neighboring nonpolar molecule

Question 5

What are london dispersion forces?

Answer 5

very weak and transient interactions between instantaneous dipoles of nonpolar molecules

Question 6

What is the strongest type of intermolecular between neutral atoms?

Answer 6

hydrogen bonds

Question 7

What are the two specific criteria for hydrogen bonding?

Answer 7

1. molecule must have a covalent bond between H and either O, N, or F
2. another molecule must have a long pair of electrons on an O, N, or F

Question 8

What is vapor pressure?

Answer 8

pressure exerted by the gaseous phase of a liquid that evaporated from the exposed surface of the liquid