1. Properties of Liquids

2. Properties of Liquids Definite volume Indefinite shape
Particles close together, but can move little bit
Liquids can flow

3. Density liquids much greater than gases
Ex:
at 25C (room temp)
DH2O(l) is 1250x greater than DH2O(g)

4. Liquids can be compressed but change in volume is very slight & requires enormous pressure

5. Viscosity
Liquids exhibit viscosity
Viscosity = resistance to flow

6. Viscosity depends on: strength of attractive forces
sizes & shapes of molecules &
temperature

7. As temperature , viscosity 
Easier to flow
As temperature , viscosity 
More difficult to flow

8. Oil in engines prevents direct metal to metal contact
thin film oil on surfaces needed to prevent flaking
of metal
oil too thick:
won’t circulate at low temps
oil too thin:
lose film strength at high temps

9. Surface Tension Particles at surface of liquid:
- exist in unbalanced environment
- no attraction from above to balance attractions from below

11. Surface Tension
Surface Tension = Energy required to ↑ surface area = measure of inward pull
Strong attractive forces 
High surface tension

14. Capillary Action
Upward movement of liquid in narrow tube = capillary action

16. meniscus of liquid:
Concave vs Convex

17. Force(H2O-glass) 
Force(H2O- H2O)
Force(Hg-glass) 
Force(Hg-Hg)