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1. Properties of Water

2. Learning Objectives:
1. use the molecular structure of water
to explain its properties;
2. explain the properties of water with its
intermolecular forces; and,
3. recognize the important application of
the properties of water.

3. Column A
1. The intermolecular
attraction between the
same molecules
2. The intermolecular
attraction between unlike
molecules
3. Resistance to flow
4. Is the measure of the
tendency of a material to
change into
5. Is the required energy to
vaporize 1 mole of a liquid
at 100°C
Column B
a. Viscosity
b. Vapor pressure
c. Adhesion
d. Molar heat of the
gaseous vaporization
e. Cohesion
Matching Type

4. Picture Analysis
How relevant is this picture?

5. Why do people say that water is necessary for life? Why
have we never found any living organism that can flourish
in a completely dry environment? How is it that something
odourless, colourless, tasteless and relatively unreactive
makes up 60% of our body mass? Why could another
liquid not be used? Why water?
Water has several properties that make it unique amongst
compounds and make it possible for all forms of known
life to function.
Properties of Water

6. Water
• major necessities to survive
• no water there would be no life on earth
• With all the benefits we get from the
water we should be warned of how
destructive it is.

7. Water as a unique substance
Water molecules are polar, with partial positive charges on
the hydrogens, a partial negative charge on the oxygen, and
a bent overall structure. This is because oxygen is more
electronegative, meaning that it is better than hydrogen at
attracting electrons. Water is an excellent solvent.
Molecular Structure of water

8. Water as a unique substance
Intermolecular forces of water
Because of the unequal
sharing of electrons, this
makes the oxygen side to
be partially negative and
each of the hydrogen is
partially positively
charged a
hydrophilic (water-loving), and
those substances that are
nonpolar which don’t dissolve in
water are called hydrophobic
(water-fearing).

9. It is the only natural substance found in all three
physical states at the temperatures that naturally
occur on Earth.
Water as a unique substance

10. Ice is less dense than water
Density of Liquid
Why do ice floats on water?
Water as a unique substance
ice 0.9167–0.9168 g/cm3
water 0.9998–0.999863 g/cm3

11. Water has a very high melting and boiling
point compared to other similar
molecules
This is what means it is seen as a solid, a
liquid and a gas on Earth. If water was not a
liquid at most of the temperatures we see on
Earth the seas would all be ice, there would
be no rain, nothing for plants to collect and
animals to drink. Even our cells are filled with
liquid water, which would not be possible
either.

13. Water has unique properties. Just like you.
You also have unique properties. How are
you different from others. How can you use
your uniqueness to inspire others?

14. Physical Properties of water Description
1. Type of intramolecular
force
2. Type of Intramolecular
force
3. Specific heat
4. Surface tension
5. Density as compared to
other liquids
6. Heat of vaporization
7. Vapor pressure
Complete the Table: