Bellwork
1. Why are water molecules
attracted to each other?
2. What are the oxygen and
hydrogen molecules sharing in a
water molecule?
3. Which bond is stronger: a
hydrogen bond or a covalent
bond?
Water
We talked about 4 properties of
water yesterday:
cohesion
adhesion
surface tension
solvent
Water
Today, we’ll investigate two more
important properties of water...
capillary action
and
specific heat capacity
Capillary Action
Inside a tube,
water molecules
are attracted to
themselves and the
sides of the tube.
The smaller the
diameter of the
tube, the higher
water climbs.
http://www.jayreimer.com/TEXTBOOK/iText/products/0-13-115516-4/ch23/ch23_s5_1.html
Capillary Action
This
property is
why plants
can get
water up to
the top of
the plant
without
energy.
http://thedesperatecraftwives.blogspot.com/2012_07_01_archive.html
Specific Heat Capacity
Heat added
to a
substance
should result
in a
temperature
change in the
substance.
http://www2.honolulu.hawaii.edu/instruct/natsci/science/brill/sci122/Programs/p20/p20.html
Specific Heat Capacity
If the temperature
outside the water
changes, it takes
quite a bit of
energy or change
in temperature to
make the
temperature of
water change.
http://www2.honolulu.hawaii.edu/instruct/natsci/science/brill/sci122/Programs/p20/p20.html
Specific Heat Capacity
Which gets hot
first: the water
or the pot?
https://share.ehs.uen.org/node/9374
http://www.123rf.com/photo_2456212_water-boiling-in-a-clear-pot-over-gas.html
Water Quiz
1. What does cohesive mean?
A: attractive
B: repellent
C: loose
D: sticky
Water Quiz
2. What does adhesive mean?
A: attractive
B: repellent
C: loose
D: sticky
Water Quiz
3. Which does not belong? Water
is tasteless, soundless, odorless,
and colorless
A: soundless
B: tasteless
C: odorless
D: colorless
Water Quiz
4. Water’s high surface tension
allows it to do what?
A. It gives water the ability to bead on
objects.
B. It gives water a sticky “property.”
C. It gives water the ability to circulate
upward, on, and through objects.
D. It gives all of the above.
E. It gives none of the above.
Water Quiz
5. Which of the following
statements is incorrect about
water?
A. Water is a polar molecule.
B. Water will not stick to the walls of a
thin tube.
C. Water is the universal solvent.
D. The bond between water molecules
are called hydrogen bonds.
Water Quiz
6. The strength of the bonds in
water that prevent the surface of
water from being broken is due to:
A. its ability to dissolve many materials
B. surface tension
C. specific heat
D. capillary action