Heating Curve (Water)
Hypothesis:
Predict: What
will the Heating
Curve for H2O look like? Why? How does heating
water relate to electricity in CA?
Materials:
400
mL beaker
with 140 g H2O(s) in
it; Bunsen burner; ring stand; beaker tongs; thermometer;
graph paper.
Procedure:
Chart the
heating curve of
H2O
on graph paper. The x-axis will be time (measured
in minutes) and the y-axis will be temperature (measured in
°C).
Set up the
burner, stand,
screen and put the H2O(s) in
the beaker.
Find the
initial
temperature before lighting the burner. Your data should start
when the
temperature (T) is CONSTANT.
Light the
burner, place it
under the beaker and start timing.
Record your
data/observations and plot the points on your graph. Your data
should
be
complete when T is constant (does not change) for at
least 5
min.
Questions to
think about
before writing your Conclusion:
• What is HEAT?
What
is TEMPERATURE?
• What effect
does HEAT
have on a substance?
• What is a
"phase
change" or "physical change"?
•
Why does the curve look the way it does and what is each phase
called?
*How does this relate to how electricity is made in
California? Can you explain our resources and give examples?