Gen Chem 3rd

Review
Capillary
Action
2
Review
Adhesion
3
Review
Surface
Tension
4
Review
Boiling
Point
5
Match Me! Activity 1
Column A Column B
1. The intermolecular attraction
between the same molecules a. Viscosity
between unlike molecules b. Vapor pressure
3. Resistance to flow
4. Is the measure of the tendency of c. Adhesion
a material to change into the gaseous
5. Is the required energy to vaporize d. Molar heat of vaporization
1 mole of a liquid at 100°C
e. Cohesion
6
Match Me! Activity 1
Column A Column B
between the same molecules a. Viscosity
between unlike molecules b. Vapor pressure
3. Resistance to flow
4. Is the measure of the tendency of c. Adhesion
a material to change into the gaseous
5. Is the required energy to vaporize d. Molar heat of vaporization
1 mole of a liquid at 100°C
e. Cohesion
7
Properties
of
Water
Airalyn M. Orfiano General Chemistry 2
Concept Map Activity 2
Properties
of
Water
9
What
is
WATER? General Chemistry 2
W
A
T universal solvent
E
R 11
Properties
of
WATER? General Chemistry 2
W inorganic compound
A colorless
T odorless
E tasteless
R 13
W Main properties of water
polarity
A cohesion
T adhesion
surface tension
E high specific heat
R 14
Can you think of a
substance that cannot be
dissolved in water? Why?
15 Presentation title 20XX

MOLECULAR STRUCTURE OF WATER
Figure 1 shows a water
molecule with one
oxygen atom that is
covalently bonded with
two hydrogen atoms.
The sharing of
electrons from the outer
energy shell of two
atoms of oxygen makes
the covalent bond.
16
MOLECULAR STRUCTURE OF WATER
The sharing of these

electrons is not shared
equally within the
molecule making it
polar
17
B. INTERMOLECULAR FORCES OF WATER
unequal sharing of
electrons- makes the
oxygen side to be
partially negative and
each of the hydrogen is
partially positively
charged
18
The slightly negative

particles of a water
molecule will be attracted to
water's hydrogen atoms of
the adjacent water
molecule, while the slightly
positive particles will be
attracted to water's oxygen
molecule of that adjacent
19
This type of intermolecular

force makes the water polar
and explains why water is a
universal solvent. In other
words, water is a very effective
solvent enabling to break apart
many substances. The claim on
the polarity of the water
molecule is shown in figure 3.
20
substances that are
polar and ready to
HYDROPHILLIC be dissolved in
WATER-LOVING
water
21
substances that are
nonpolar which
HYDROPHOBIC don’t dissolve in
WATER-FEARING
water
22
C. WATER HAS HIGH
SPECIFIC HEAT
23
the amount of heat
needed to raise the
SPECIFIC HEAT temperature of 1 gram
of a substance 1 degree
Celsius (°C)
24
Why does water has a high
specific heat?
to break the hydrogen bonds of WATER

D. Density of liquid
water vs density of ice
cube
26
Why does ice cube float on
water?
solid form of water is less dense than its liquid form

As the water cools
off the density gets
higher wherein at
4°C the density of
water is at maximum
and the water
contracts.
28
At temperature
below 4°C, the
density did not
increase rather it
decreased.
29
This displays the
abnormal behavior
of water or unique
behavior wherein
water`s density
below 4°C further
decreases until it
freezes into an ice
cube at 0°C. 30
The water expands
instead of contracting
when the temperature
goes from 4°C to 0°C,
and it becomes less dense
because water molecules
normally form open
crystal structure when in
solid form.
31
ANOMALOUS
EXPANSION OF supports the marine life
WATER in the colder regions
where the formation of
ice on bodies of water
is evident.
32
33
E. Surface Tension,
Heat of Vaporization
and Vapor Pressure
34
Activity 5
W
A
has the highest
cohesion of any non-
T metallic liquid that
results in its high
E surface tension
R 35
Activity 5
W has high surface

A tension
T Due to hydrogen
E bonding in water
molecule
R 36
Activity 5
W
A has an exceptionally
high heat of
T vaporization which is
E 41 kJ/mol
R 37
Activity 5
W water has very strong

A intermolecular forces
T -then it has a low
E
vapor pressure
R 38
Activity 5
True 1. Water has the

highest cohesion
Or on all non-
False metallic liquid.
39
2. Adhesion is
True shown between the
Or attraction of same
molecules
False
40
3. The anomalous
True expansion of water
Or is evident at 4°C
where water further
False contracts until
freezes at 0°C.
41
4. The oxygen atom
True of water is
Or covalently bonded
with the two
False hydrogen atoms in a
water molecule.
42
True 5. As we raise the
temperature of water
Or this would mean we
False
are increasing its
average kinetic
energy.
43
True 6. The sticking of
water molecules on
Or the wall of a beaker
False
would display
adhesion.
44
True 7. The bond that holds
each water molecule
Or with the adjacent water
False
molecule is a
hydrogen bond.
45
True 8. Substances that are
polar and ready to be
Or dissolved in water are
False called hydrophobic.
46
9. The type of
True intermolecular force
which is a polar covalent
Or bond makes the water
False
polar and explains why
water is a universal
solvent.
47
10. High surface tension
True is the property of water
that allows the lucky
Or fishes to stay on lakes
where the water takes a
False lot of heat before it gets
hot
48
Answer Key
1. TRUE 6. TRUE
2. COHESION 7. TRUE
3. BELOW 4°C 8. HYDROPHILLIC
4. TRUE 9. HYDROGEN BOND
5. TRUE 10. HIGH SPECIFIC HEAT

Activity 6
1.Where is the negative charge of

1
water molecule concentrated?
2. What holds between the oxygen
and hydrogen atoms?
3. Where is the positive charge of
2 3
water molecule concentrated?
Molecular Structure of Water

51
Water has unique properties.
Just like you.
You also have unique properties.
How can you use your uniqueness to inspire others?
Quiz
A. oils B. sugar C. butane D. alcohols
1. Which among the above compounds is/are

water-hating?
2. Which among the above compounds is/are

water-loving?
Quiz
3. Which of these concepts help explain why

water can travel up a narrow tube?
A. polarity B. specific heat

C. specific gravity D. adhesion and cohesion
Quiz
4. Which of the following explains why water is

a universal solvent?
A. Due to the high specific heat of water

B. Due to the strong surface tension of water
C. Due to the cohesiveness and adhesiveness of water
molecule
D. Due to its polarity, that allows to dissolve a great number of
substances that contain ionized atoms or polar molecules.
Quiz
5. What type of intramolecular force holds the

atoms of water together?
A. covalent bond
B. hydrogen bond
C. ion-ion interaction
D. polar covalent bond

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Review

15 Presentation title 20XX

The sharing of these

The slightly negative

This type of intermolecular

to break the hydrogen bonds of WATER

25 Presentation title 20XX

solid form of water is less dense than its liquid form

27 Presentation title 20XX

W has high surface

W water has very strong

True 1. Water has the

49 Presentation title 20XX

1.Where is the negative charge of

Molecular Structure of Water

A. oils B. sugar C. butane D. alcohols

1. Which among the above compounds is/are

2. Which among the above compounds is/are

3. Which of these concepts help explain why

A. polarity B. specific heat

4. Which of the following explains why water is

A. Due to the high specific heat of water

5. What type of intramolecular force holds the

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