Essential Questions
- How is the Law of Conservation of Energy expressed in chemical systems?
- How is energy transferred in chemical and physical systems?
Thermochemistry - The study of the transfers of energy as heat that accompany chemical reactions and physical changes
- Be able to define the system, surroundings, and the universe
- Apply law of conservation of energy to a system undergoing energy transformation
- Distinguish between different forms of energy: kinetic, potential, chemical, and thermal
- relate chemical and thermal energies to potential and kinetic energy.
- Define and use enthalpy to classify a reaction as endothermic or exothermic
- Use thermochemical equations to calculate energy changes and classify reactions as exothermic or endothermic
- Explain heat of reaction, heat of combustion, and enthalpy change.
- Perform calculations involving heat, mass, temperature change, and specific heat
- Calculate the heat of a chemical process using calorimetry
Thermo Packet
Day 6 11/14Introduction to Thermo: Today in class we will begin to explore heat, energy, and the universe and its relationship to temperature. We will define the direction of heat flow and what this implies in relation to the system and the surrounding. We will preform a quick lab in class to visualize between an endothermic and exothermic reaction and to identify the system and the surroundings.
For the next class please watch and take notes on the following video discussing calorimetry. |
Day 7 11/16Calorimetry and Heat Transfer: Today we will discuss heat transfer and how to calculate the heat transferred using calorimetry.
Calorimetry Practice Answers |
Day 8 11/18The Energy of a Cheeto: Today you will use calorimetry to determine the caloric value of a cheeto in Joules.
The Energy of a Cheeto |
Thanksgiving Break - please watch the following video discussing heating/cooling curves.
|
Day 9 11/28Heating Curves and Cooling Curves: Today we will look at the amount of energy needed to raise the temperature of a substance from T1 to T2 using mc(Tf-Ti) and latent heat. We will also discuss what is a happening at a molecular level during the temperature change and why an increase in temperature is not observed during a phase change. We will also experimentally determine the molar (latent) heat of fusion.
What is the Latent Heat of Fusion Please watch the following video on Heats of Fusion for next class. Start the video at 2:48. |
Day 10 11/30Heat of Reaction: It is possible to calculate the heat of a reaction by using the heats of formation for the individual components. We will explore and practice using heats of formation to determine the overall heat of reaction.
Please watch the following video over Hess's Law for the next class. |
Day 11 12/5Quiz Lessons 3.6 to 3.10
Hess's Law: Not all reactions take place in one step or it may not be possible to measure the heat produced by the reaction. Hess's Law allows for us to measure the heat of a reaction by manipulating elementary steps to give the overall reaction.
Hess's Law Solutions |
Day 12 12/7Specific Heat Quick Lab: Can you determine the specific heat of a metal using calorimetry. The rest of the period will be used for exam review.
|
Day 13 12/9Exam 3
|
Day 14 12/12Final Exam Review
|
Day 15 12/14 (C Day) |
Finals Day 1 12/155B 8:10-10:10
0B 10:20-12:20 |
Finals Day 2 12/161A
0A |
Finals Day 3 12/192A
3A |
Finals Day 4 12/206B
7B |