Thermal Energy, Thermal Expansion Computer Lab

coralmonkeyMechanics

Oct 27, 2013 (3 years and 9 months ago)

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Thermal Energy, Thermal Expansion Computer Lab



Heading:




Review
energy types here


rather simple review, but clarifying nonetheless.

http://www.think
-
energy.co
.uk/ThinkEnergy/11
-
14/activities/TypesEnergy.aspx


Click on Energy Transformation on the right side of the screen
:

http://www.think
-
energy.co.uk/ThinkEnergy/11
-
14/
activities/EnergyTrans.aspx

Make sure you go to Part 2 (bottom of the screen) and complete the energy
transformation online activity.



Thermal Expansion
:

http://hyperphysics
.phy
-
astr.gsu.edu/hbase/thermo/jarlid.html#c1

Explain how to loosen a tight jar lid using thermal expansion.





Go to:

http://www.powermasters.com/heat_energy.html

What is the heat energy of a

substance determined by?




What is the difference between a hot object and a cool object’s molecules?




Look at the balloon and tape measure experiment. What will happen when the balloon is
put in the fridge? Why?





What will happen when the balloon

is put into the sunshine? Why?





Explain the need for expansion joints in railroad tracks and bridges. Remember we live
in central Ohio.




Specific Heat Capacity
:

Visit:

http://www.iun.edu/~cpanhd/C101webnotes/matter
-
and
-
energy/specificheat.html


What is temperature a direct measure of?



The more kinetic energy that molecules in a substance ha
ve th
e _______________ the
temperature.


Heat loss or gain is equiv
alent to _________________________________________.



Read the paragraph about the specific heat of copper. What happens to heat energy if we
double the amount of copper?





Then
visit:

http://www.algebralab.org/practice/practice.aspx?file=Algebra_SpecificHeatCapacity.xml


Check out the practice problems


you may need scrap paper and may use a calculator.
Remember Q=mc delta T. Where Q is the quantit
y of heat and c (it’s called Cp on this
site) is the specific heat capacity.

Show you work for ONE problem (your choice) here:





Check your answers and write down your score:




Go to:

http://www.physics4kids.com/files/thermo_intro.html

Explain heat in scientific terms:





Explain energy movement in any system:





Click on “Next stop on the Tour” (purple button)


How does heat energy move?





What is a gradient?





Click on next st
op
.


Fahrenheit, Celsius, and Kelvin are all measures of _________________________.


Explain

what each is based on…

Fahrenheit:





Celsius:





Kelvin:





Thermodynamics:

http://www.ph
ysicalgeography.net/fundamentals/6e.html

What are the three laws of thermodynamics?


1.




2.




3.



Experiment 1
-

http://jersey.uoregon.edu/vlab/Thermodynamics/therm1a.html

In
this experiment you are mixing two gases of different temperatures until they reach
equilibrium.

BEFORE YOU START THE EXPERIMENT ANSWER THESE QUESTIONS:

What was the initial temperature of the left side?

Right side?

What do you think the equilibrium temper
ature will be?


Now click on the red bar to open the channel and observe what happens?


How close was your initial estimate of equilibrium temperature to the actual?




Experiment 2
-

http://jersey.uoregon.edu/vlab/Thermodynamics/therm1b.html

Answer the two questions on the website BEFORE YOU OPEN THE CHANNEL.

1.

What do you think the final equilibrium temperature will be?


2.

Will this system take a longer or a shorter time to equilibrat
e than the previous
one?



Experiment 3
-

http://jersey.uoregon.edu/vlab/Thermodynamics/therm1c.html


1.

What do you think the final equilibrium temperature will be?



2.

Will this syste
m take a longer or a shorter time to equilibrate than experiment 2
which had the same temperature difference as this one?




Write down 2 things that you learned from these experiments about thermodynamics.
Review the laws if you have to.

1.



2.