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: DH2O(l) is 1250x greater than
DH2O(g) at 25C (room temp)
Liquids can be compressed but change in volume very slight & requires enormous pressure

4. Viscosity
Liquids exhibit viscosity
Viscosity = resistance to flow

5. stronger the IMF, the higher the viscosity
Viscosity depends on:
strength of IMF
sizes & shapes of molecules
& temperature
stronger the IMF, the higher the viscosity
as temperature , viscosity 
as temperature , viscosity 

6. engine oil prevents direct metal to metal contact
thin film oil on surfaces prevents metal from flaking
if oil too thick, won’t circulate at low temps
if oil too thin, will lose film strength at high temps

7. Where does the marble drop fastest?
Slowest?
water
glycerol

8. Viscosity & Petroleum Drilling

9. Surface Tension
Particles at surface of liquid exist in unbalanced environment
No attraction from above to balance attractions from below
Surface seeks smallest possible area

10. Net attractive force pulling down

11. Surface Tension Surface Tension = E required to ↑surface area
= measure of inward pull
Strong intermolecular attractions 
High surface tension

15. Surfactants Compounds that lower surface tension of H2O
Disrupt hydrogen bonds between H2O molecules
See video

17. Capillary Action Water forms concave meniscus in glass tube
Attractive forces between water and glass > attractive forces between water molecules
Upward movement of liquid in narrow tube = capillary action

19. Force(H2O-glass)  Force(H2O- H2O) Force(Hg-glass)  Force(Hg-Hg)
CONVEX CONCAVE
meniscus meniscus