Intermolecular forces

Question 1

What are intermolecular forces?

Answer 1

Weak interactions between dipoles of different molecules

Question 2

What are the types of intermolecular forces?

Answer 2

Induced dipole-dipole interactions (london forces)
Permanent dipole-dipole interactions
Hydrogen bonding

Question 3

What are london forces?

Answer 3

Weak intermolecular forces that exist between all molecules.

Question 4

Where do london forces act?

Answer 4

They act between induced dipoles in different molecules.

Question 5

What is the trend between the number of electrons and induced dipoles?

Answer 5

The greater the number of electrons:
The larger the instantaneous and induced dipoles.
The greater the induced dipole-dipole interactions.
The stronger the attractive forces between molecules.

Question 6

What does van der waals forces refer to?

Answer 6

Permanent and induced dipole-dipole interactions.

Question 7

What regular structure do simple molecules form?

Answer 7

Simple molecular lattice

Question 8

What are the conditions in a simple molecular lattice?

Answer 8

The molecules are held by weak intermolecular forces.
The atoms within each molecules are bonded strongly by covalent bonds.

Question 9

What type of melting and boiling points do simple molecular substances have?

Answer 9

Low

Question 10

What happens when a simple molecular compound is added to a non polar solvent?

Answer 10

Intermolecular forces are formed between the molecules and the solvent.
The interactions weaken the intermolecular forces in the simple molecular lattice.
The intermolecular forces break and the compound dissolves