Molecules - Forces

Question 1

Rank the following from strongest to weakest:

debye, hydrogen, keesom, coloumbic, ion-dipole, london dispersion

Answer 1

1. Coloumbic
2. Ion-dipole
3. Hydrogen
4. Keesom
5. Debye
6. London dispersion

Question 2

What makes coloumbic interactions stronger?

Answer 2

Smaller ions and higher ionic charges

Question 3

Where can hydrogen bonding occur?

Answer 3

Between highly electronegative atoms and hydrogen atoms bound to highly electronegative atoms (F,O,N)

Question 4

How do intermolecular forces affect the boiling point of a substance?

Answer 4

They determine how well a molecule is held together. Stronger bonds require higher temperature to break compared to weaker bonds.

Question 5

How do intermolecular forces affect the pressure of gases?

Answer 5

They can make gases act less ideal, as intermolecular forces can attract molecules closer together and lower the collisions/pressure of the gas.