Intermolecular Forces

Question 0

Permanent dipole-dipole forces

Answer 0

A permanent dipole-dipole are weak attractive forces between permanent dipoles in neighbouring molecules.

Question 1

Intermolecular force

Answer 1

The attractive forces between neighbouring molecules (weak).
- caused by weak attractive forces between very small forces in a dipole.

Question 2

van der Waal’s forces

Answer 2

Attractive forces between induced dipoles in neighbouring molecules.
- occur between all molecules, whether polar or non-polar.

Question 3

3 types of intermolecular forces

Answer 3

+ hydrogen bonds
+ permanent dipole-dipole forces
+ van der Waal’s

Question 4

Hydrogen bond

Answer 4

A strong dipole interaction between an e- deficient H atom (O-H+, N-H+) on one molecule & a lone pair of e- on a highly electronegative atom (H-O-, H-N-) on a different molecule.

Question 5

Ice lattice

Answer 5

An open network of H2O molecules.

(The H bonds hold the lattice apart and each O atom has the possibility to be bonded in 4 directions (2 covalent bonds & 2 H bonds))