Thermochemistry Unit Name:_____________
Chemistry
Thermochemistry Pre and Post Unit Assessment
On a scale of 1-5 with rate your knowledge or skill level of each of the following areas:
1 – No Clue
2- Murky
3- General Idea
4- Understand Most
5- I could teach this
Learning Target
Estimate your ability before
the start of the
thermochemistry unit
Estimate your ability at
the end of the
thermochemistry unit
1. Ability to read and write chemical
equations
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2. Ability to perform an atom inventory
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3. Ability to balance a chemical equation
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5
4. Ability to convert mass to mole and mole to 1
mass
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5
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5. Ability to predict the moles or mass of a
substance given the moles or mass of
another substance in a balanced chemical
6. equation
Ability to write and interpret a
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thermochemical equation.
7. Ability to calculate the heat absorbed or
released during a chemical reaction.
Content Standard for this unit.
Chemical reactions change the arrangement of atoms in the molecules of substances. Chemical reactions
release or acquire energy from their surroundings and result in the formation of new substances.
•
Give examples of chemical reactions that either release or acquire energy and result in the formation of
new substances
• define energy, potential energy, kinetic energy.
• define endothermic and exothermic reactions.
• describe how heat is transferred in endothermic and exothermic reactions.
• define and understand enthalpy of reaction.
• calculate ΔH.
Thermochemistry Unit Name:_____________
Pre Unit Assessment
The best way to “change your brain” is to study new material at fixed intervals. If you just learn it
fast and spit it all out on an exam, you haven’t changed your brain. Short term learning is a waste of
time. Breaking up your studies into daily 5 to 10 minute repeats, will result in new material going into
your long term memory. When you do this, you will have literally changed your neurons. You will
retain more of the info later and you will be able to learn related material faster because the
hardware is already wired. Want to learn more in less time? Spend 5 or 10 minutes each evening
reviewing the main points of what you learned in chemistry and your other classes. Write it down,
work out a problem, turn your notes into questions and answers.
1. Set a learning goal for yourself this unit:
2. Describe your plan to reach this goal:
3. What is thermochemistry? [First try to guess what it is.] Page 293
4. What is chemical potential energy? Page 293
5. Explain the difference between and endothermic and an exothermic process. Use a diagram to
explain. Page 294
6. What is heat capacity? Page 295______________________________________
7. Define calorie. Page 295____________________________________________
8. How many calories does it take to raise 10 grams of water by 5 degrees Celsius?
9. Explain the difference between heat capacity and specific heat capacity. Pages 296 and 297.
10. Thermochemical equations include 2 additional bits of information that you didn’t include in
chemical equations 1st semester. Page 303 These are:
1. State of matter of the reactant and product.
(s) = ___________ (l) = ____________(g) = ___________ (aq) = ____________
2. Heat change. Exothermic ∆H = - 50 kj Endothermic ∆H = + 50 kj
11. Write a thermochemical equation that shows the combustion of methane. Methane (CH4)
……..gas reacts with oxygen gas to produce water and carbon dioxide. This reaction releases 890
……..kj per mole.