WARM UP 1.Identify the intermolecular forces present in each of the following mixtures: -PCl 3 and CCl 4 -H 2 O and H 2 O -NaCl and H 2 -CO 2 and N 2 -HF.

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Presentation transcript:

WARM UP 1.Identify the intermolecular forces present in each of the following mixtures: -PCl 3 and CCl 4 -H 2 O and H 2 O -NaCl and H 2 -CO 2 and N 2 -HF and HCOOH -Ca 3 (PO 4 ) 2 and H 2 O -BH 3 and CH 2 O -SF 2 and F 2

The Big Bang Theory

Properties of Phases

Solids Definite shape and volume (crystal) –Strong intermolecular forces –Little motion

Gases Change shape and volume –Lots of molecular motion and space –Very little forces to hold them together

Liquids Definite volume, change shape –Some intermolecular forces, but they can be broken and re-formed

Properties of Liquids Increased with stronger IMFs –Viscosity Resistance to flow –Surface tension Surface molecules pulled together

Properties of Liquids –Cohesion and adhesion Stickiness to itself, and to other things

Water’s Special Properties Strong H-bonds give it “super-stickiness” –High density liquid Expands on freezing Ice floats

WRAP UP Describe how the intermolecular forces present in solids, liquids, and gases are different.

WARM UP List the 4 properties of liquids that are affected by intermolecular forces. Describe how they change as the strength of intermolecular forces change.

MINI-LAB Drops on a Penny Heather Nelson January 2012

WRAP UP List 2 or 3 unique properties of water. Explain why water has those properties.

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