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Unit 7: Thermodynamics
Chemistry!
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*Catalyst:
WEEK 30  4/24/15
Explain how we can use a
can of water to find the
energy of a Cheeto.
Also, is this a perfect
method? Why or why not?
Turn in week 30 question sheets!
***You have 1 song to complete the
catalyst and to chat with neighbors!
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4/24/15
Learning Intention:
We will demonstrate
knowledge of the energy
found in fuel and food.
Success Criteria:
We will be successful when we
can conduct a self-designed
procedure to calculate the
amount of energy in a gram of
a Flamin’ Hot.
AGENDA!
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
Reminder
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SOW/Classroom Cardinal
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Class-wide procedure!
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LAB!!!

Parting treats
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Every
Student of the week.
Friday I will recognize a student in
each class who deserves to be recognized
for their work that week
Recognition
can be due to academics,
class participation, attendance increase,
teamwork, dedication, etcetera.
That
student will be given an additional
ticket at this time to be added to the
drawing!!
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Period 1…
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Period 4…
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Period 5…
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Period 6…
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 Just look
at that
face.
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PART 2 – ENERGY IN FOOD
Procedure together!
I
am going to demonstrate
how I would write a detailed
procedure (think aloud)
Expectation:
silently follow
along, updating your
procedure or asking questions
as needed!
Procedure
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Data
Procedure
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Data
Procedure
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Data
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Lab EXPECTATIONS!
Quietly with lab group.
C3-B4-ME. Then, raise hand & wait!
LAB!
Sitting or standing at lab table
(distractions away).
Actively following procedure & then
completing analysis (#4-7)!
4)
+ Calculate the heat (q) produced by
the food. This is the roughly the same
as the heat gained by the water (so
use the equation below!) Note the s
(specific heat) of water is 4.186 J/gºC.
water:
q = s x m x ΔT
5)
+ Calculate the "fuel value" of the
food by dividing the heat from the
food by the mass of the food that
burned (Original mass - final mass)
Your answer will be in units of
Joules per gram (J/g).
6)
+ So you just got the energy per gram
in Flamin’ Hots, but your units are in
Joules. Let’s convert this into
Calories!!! (Use your answer from #5
and the equation below to do this!)
Calories per gram of food = Energy
per gram x (0.000239 Cal/J)
7)
+ If one serving of Cheetos Flamin'
Hots is 28 grams, then how many
Calories are in one serving,
according to your results (from #6)?
8)
+ Does this match up with the
Nutrition Facts label?!
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PARTINING GIFT 
Put
the lab in your binders –
We will finish analysis on
Monday!
Good
Be
work today!
safe & relax this weekend!
SUCCESS CRITERIA
Today you used calorimetry to
find the amount of calories in
every gram of Flamin Hots. Do
you think food scientists use this
method to figure out calories?
Explain why or why not.
4/24/15
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NOVA:
 https://novaforjustice.wordpress.com/
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Videos!!!
Racism:
http://www.upworthy.com/when-a-man-asks-people-to-translate-a-hatemessage-hes-received-their-response-is-unforgettable?c=ufb1
Emoji:
https://www.upworthy.com/if-you-dont-know-why-apples-diverse-emojiare-big-deal-theres-a-study-for-that?c=tpstream
What a wonderful world: https://www.upworthy.com/a-song-you-mayhave-heard-gives-a-look-at-why-our-planet-is-worthprotecting?c=hpstream
Homelessness
https://www.upworthy.com/theyre-not-celebrities-theyre-homeless-andthese-tweets-are-awful?c=reccon1
Water:
http://www.upworthy.com/shorter-showers-wont-end-our-global-watershortage-crisis-its-this-shared-understanding-that-will?c=reconDFP