Wonderful World of Water

H2O

• Oxygen is more electronegative then hydrogen.

• Electrons move towards the oxygen giving it a slight (-) charge and leaving the hydrogens with a slight (+) charge.

Hydrogen Bonding

• The slight charges makes water polar.• The polarity causes hydrogen bonding

High Boiling Point

Why are the boiling points

of H2O, HF and NH3 higher then similar compounds?

Phase Change Diagram

• Water • Other

What is different? Why?

Water vs Ice

Ice Density vs Water Density

Ice Floating on Water

• Why is it important that ice floats on water?

Ice Skating and Squeaky Snow