1. Properties of Liquids

2. definite volume indefinite shape particles close together, but can move little bit –liquids can flow

3. density liquid much greater than gas –ex: D H2O(l) is 1250x greater than D H2O(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

6. viscosity depends on: –strength of IMF –size & shape of molecules –temperature stronger the IMF, the higher the viscosity –as temperature , viscosity  –as temperature , viscosity 

7. 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

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

9. Surface Tension particles at surface of liquid exist in unbalanced environment –no attraction from above to balance attractions from below –net attractive force pulling down

10. measure of inward pull Strong IMF  high surface tension

12. mercury: Hg (l)

13. Surfactants compounds that lower surface tension of H 2 O disrupt hydrogen bonds between H 2 O molecules see videovideo

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

17. CONVEX : IMF(Hg-glass)  IMF(Hg-Hg) CONCAVE: IMF(H 2 O-glass)  IMF(H 2 O- H 2 O) Shape of meniscus depends on IMF: