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| OBJECTIVES |
CONTENT |
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Examine the relationships between heat energy and reactions. |
Lesson 1 in general |
- Recognize that energy changes are associated with chemical reactions.
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Lesson 2.7 |
- Differentiate between endothermic and exothermic reactions.
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Demonstration - Endothermic and exothermic reactions |
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- Identify reactions which are used to produce useful heat.
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Research - Hot and Cold Packs |
- Consider the environmental and social effects of the use of heat energy by our society.
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Research |
Understand the quantitative description of enthalpy change. |
Lesson 2 |
- Measure some energy changes in chemical reactions.
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Calorimetry labs |
- Investigate how tables of standard heats (enthalpies) of formation are created and used.
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- Express the enthalpy change of a chemical reactions as a term in the equation for the reaction, or as a heat of reaction (ΔH).
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Lesson 2.1; Calorimetry labs |
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Understand the reasons why entropy and enthalpy effects are important. |
Lesson 3 |
- Identify how entropy effects influence chemical reactions.
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Lesson 3.1 |
- Consider the interaction between enthalpy and entropy in determining whether a reaction is spontaneous.
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Lesson 3.2 |
- Use the concept of free energy to express the quantitative relationship between entropy and enthalpy.
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Lesson 3.3 |
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Lesson 3.3 |
Understand and use the vocabulary, structures and forms of expression which characterize chemistry. (COM) |
Lessons 1, 2, 3 |
- Incorporate vocabulary such as bond energy, enthalpy, endothermic and standard heat of formation into their speaking and writing about energies of reactions.
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Lesson 2 |
- Use tables and graphs in interpreting, estimating and explaining the energy effects of chemical reactions.
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Lesson 2 |
- Relate the theoretical aspects of the study of energies of reactions to daily, practical experiences with energy produced by and consumed by reactions.
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Strengthen understanding of chemistry through applying knowledge of numbers and their interrelationships. (NUM) |
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- Read, and interpret meaning from, graphs, charts and tables.
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Labs - Temperature Changes during Change of State; Calorimetry; Hess's Law |
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Use graphs, charts and tables to help explain concepts and ideas about energy changes.
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Lesson 2 |
- Understand and explain to others (orally or in writing) how temperature change measurements can be used to infer the extent and type of bond rearrangements during a reaction.
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Lab - Temperature changes during Change of State |
Develop an understanding of how knowledge is created, evaluated, refined and changed within chemistry. (CCT) |
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- Make careful observations of energy effects in reactions, and explain how those effects can be used to make inferences about the atomic and molecular rearrangements.
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Lab - Temperature changes during Change of State |
- Reflect on the importance of theory in creating a framework by which reactions are viewed, and the place of theory with respect to the observations.
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Appreciate the value and limitations of technology within society. (TL) |
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- Explore the distribution and uses in home, school and community of technologies making use of the exothermic or endothermic nature of chemical reactions.
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Research Project |
- Assess the benefits and risks accruing from technologies which exploit the exothermic or endothermic nature of chemical reactions.
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- Use technological devices to help measure heats of reaction.
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Labs - Calometry; Hess's Law |