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 liquid much greater than gas
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
size & shape 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. Surface Tension Net attractive force pulling down
particles at surface of liquid exist in unbalanced environment
no attraction from above to balance attractions from below
surface seeks
smallest possible
area
Net attractive force pulling down

9. Surface Tension Surface Tension: Strong IMF = high surface tension
energy required to ↑surface area
measure of inward pull
Strong IMF = high surface tension

12. mercury: Hg (l)

13. Surfactants compounds that lower surface tension of H2O
disrupt hydrogen bonds between H2O molecules
see video

14. Capillary Action: upward movement of liquid in narrow tube

15. IMF(H2O-glass)  IMF(H2O- H2O)
Shape of meniscus depends on IMF:
CONCAVE:
IMF(H2O-glass)  IMF(H2O- H2O)
CONVEX :
IMF(Hg-glass)  IMF(Hg-Hg)