Week 4: Liquid, Solids, IMF

Question 1

Physical properties.
What do they depend on

What are some examples

Answer 1

Properties that a substance displayswithout changing its chemical composition
Physical properties depend on chemical structure (which determined the type of bonding and IMF

BP, MP, Solubility and density

Question 2

Intra-molecular bonds

Answer 2

Atoms in a molecule are held together by covalent bonds

Question 3

What happens if atoms/molecules have no IMF holding them together.
What are the condensed states

Answer 3

Molecules have complete freedom to spread out and take up all the space in the vessel
Condensed states are liquid and solids (due to IMF)

Question 4

Why do different states of Matter exist?

Answer 4

Due to the freedom of movement of particles
Gas- compelte freedom
Liquid- Slide over each other
Solid-Vibrate in fixed positon

Question 5

Give the Density, Shape, Volume, and IMF strength of each state

What is an exception

Answer 5

Gas- Low density, indefinite shape, indefinite volume, weak IMF
Liquid- High density, indefinite shape, definite volume, moderate IMF
Solid- High density, definity shape, definite volume, high IMF

Water as a solid has a lower densitry than liquid

Question 6

Which states cannot be compressed and why

Answer 6

Condensed states (liquid and solid) because they have a definite volume as they are closely spaced

Question 7

As you decrease KE, are more or less particles held together by IMF
As you icnrease KE, are more or less particles held together by IMF

Answer 7

Decrease KE=more particles held together (solid ie)
Increase KE=less particles held together (gas ie)