Question 1

What are the four intermolecular forces?

Accepted Answer

London Dispersion Forces

Dipole-Dipole

Hydrogen Bonding

Ion-Dipole

Question 2

What are London dispersion forces (LDFs)?

Accepted Answer

Intermolecular forces between all molecules, caused by temporary dipoles

Question 3

Why do London dispersion forces form?

Accepted Answer

Electrons in adjacent atoms randomly move in a way that makes them temporary dipoles

Question 4

What makes London Dispersion Forces stronger?

Accepted Answer

More contact between molecules

Increasing polarizability (size of electron cloud)

Question 5

What is polarizability?

Accepted Answer

How easy it is for a molecule to become polarized

(more electrons, larger electron cloud, and pi bonding increase polarizability)

Question 6

What is the difference between van der Waals forces and London Dispersion Forces?

Accepted Answer

van der Waals forces are types of forces that occur because of dipole-dipole interaction

London Dispersion Forces are a type of van der Waals forces

Question 7

What is a dipole moment?

Accepted Answer

A measurement of the seperation of two opposite electrical charges

Created by atoms in a molecule sharing electrons unequally

Question 8

What are dipole-dipole forces?

Accepted Answer

Intermolecular forces between the positive end of a polar molecular and the negative end of another polar molecule

(only polar molecules)

Question 9

What makes dipole-dipole forces stronger?

Accepted Answer

Magnitudes of the dipoles and their relative orientation

Question 10

What are dipole-induced-dipole forces?

Accepted Answer

Intermolecular forces between polar and nonpolar molecules

(polar molecule induces a dipole in the nonpolar molecule)

Question 11

What makes dipole-induced-dipole forces stronger?

Accepted Answer

The polar molecule having a dipole with a greater magnitude

Question 12

What are ion-dipole forces?

Accepted Answer

Intermolecular forces between ions and polar molecules

Question 13

What is hydrogen bonding?

Accepted Answer

A strong intermolecular interaction between hydrogen atoms bonded to highly electronegative atoms (N, O, F) and another highly electronegative atom (N, O, F)

Question 14

What interactions occur in large biomolecules?

Accepted Answer

Noncovalent interactions between different molecules or different regions of the same large biomolecule

(1) Intermolecular Forces, AP Chemistry Flashcards