Bonding: intermolecular

Question 1

what are the weakest intermolecular forces

Answer 1

• London force, also called temporary dipole, without which non polar molecules would not be attracted to each other in any way, are about a tenth of the strength of the dipole- dipole forces.

Question 2

why some substances, like water, have unexpectedlylow vapor pressures, high heats of vaporization, and high melting points

Answer 2

• bcs of hydrogen bonding

Question 3

what is Resonance structure and examples

Answer 3

is a hybrid of the possible drawings because no one Lewis structure can represent the situation.
- benzene, - sulfur trioxide, -chlorobenzene.

Question 4

Two theories explain molecular structure:

Answer 4

VSEPR theory uses valence shell electron pair

repulsion.Hybridization theory uses changes in the orbitals of the valence electrons.

Question 5

Kinetic molecular theory hypothesis

Answer 5

• matter is composed of extremely small particles called atoms. The v occupied by these particles is ignored compared containing space.
• the particles of matter are in constant motion. In gases particles are in continuous, random, straight-line motion.
• when they collide w/ each or walls, there is no loss of energy.

Question 6

Why Is energy absorbed at the plateaus on the curve of phase change, where the temp is constant

Answer 6

It is used to break the intermolecular forces btn molecules by increasing the potential energy content of the molecules for change of state to occur