Properties of Water

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Slide 1

The Extraordinary Properties of Water

Slide 2

Water

A water molecule (H2O), is made up of three atoms --- one oxygen and two hydrogen.

O

Slide 3

Water is Polar

In each water molecule, the oxygen atom attracts more than its "fair share" of electrons

The oxygen end “acts” negative

The hydrogen end “acts” positive

Causes the water to be POLAR

However, Water is neutral (equal number of e- and p+) --- Zero Net Charge

Slide 4

Hydrogen Bonds Exist Between Water Molecules

Formed between a highly Electronegative atom of a polar molecule and a Hydrogen

One hydrogen bond is weak , but many hydrogen bonds are strong

Slide 5

Interaction Between Water Molecules

Negative Oxygen end of one water molecule is attracted to the Positive Hydrogen end of another water molecule to form a HYDROGEN BOND

Slide 6

What are the Properties of Water?

Slide 7

Properties of Water

At sea level, pure water boils at 100 °C and freezes at 0 °C.

The boiling temperature of water decreases at higher elevations (lower atmospheric pressure).

For this reason, an egg will take longer to boil at higher altitudes

Slide 8

Properties of Water

Cohesion

Slide 9

Properties of Water

Cohesion

Adhesion

Slide 10

Properties of Water

Cohesion

Adhesion

High Specific Heat

Slide 11

Properties of Water

Cohesion

Adhesion

High Specific Heat

High Heat of Vaporization

Slide 12

Properties of Water

Cohesion

Adhesion

High Specific Heat

High Heat of Vaporization

Less Dense as a Solid

Slide 13

Cohesion

Attraction between particles of the same substance ( why water is attracted to itself)

Results in Surface tension (a measure of the strength of water’s surface)