1.3.3 Intermolecular forces Flashcards
1
Q
What are the three types of intermolecular force in order of strength?
A
Van der Waal’s, permanent dipole-dipole, and hydrogen bonding.
2
Q
How do Van der Waals come about?
A
Small changes in the distribution of the electron cloud cause short-lived dipole moments
3
Q
What two things does the strength of Van der Waals’ forces depend on?
A
- The size of the atom or molecule; and- The area of contact between molecules
4
Q
How does dipole-dipole bonding occur?
A
When the two atoms in a covelant bond have different electronegativities
5
Q
What is hydrogen bonding?
A
Hydrogen bonding is a type of dipole-dipole bond between a hydrogen atom, and a oxygen, nitrogen or fluorine directly
